A Brief History of the United States: Promise, Conquest, and the Argument That Never Ends

Follows: United States: A Condensed History of Reinvention, Power, and Contradiction

On 4 July 2026 the United States turned 250. Four days before the anniversary, its Supreme Court had to rule on whether a baby born on American soil to parents who are in the country unlawfully, or only temporarily, is an American citizen. The Court said yes: the Fourteenth Amendment, written in 1868 to make freed slaves citizens, still means what it has long been read to mean. Earlier that year the same Court had ruled on whether a president may set taxes on imports by himself under an emergency law. It said no.

Two and a half centuries in, the country was still arguing about who belongs and who holds power. That is not a sign that something has gone wrong with the American story. It is the American story. The condensed piece in this library gives the outline; this is the full version, from the first footprints to the eve of the midterm elections of November 2026.

In this history

1. Before the United States: the peoples of North America (to 1492)
2. Colonies and slavery (1492–1763)
3. Revolution (1763–1783)
4. The Constitution and the early republic (1783–1828)
5. Expansion and dispossession (1803–1890)
6. Cotton, slavery and the road to war (1820–1861)
7. Civil War and Reconstruction (1861–1877)
8. Industry, immigration and empire (1877–1914)
9. World wars, the Depression and the New Deal (1914–1945)
10. Superpower, Cold War and civil rights (1945–1974)
11. From the 1970s to the 2000s (1974–2008)
12. Polarisation and the present (2008–2026)
13. How to understand the United States today

Part 1 — Before the United States: the peoples of North America (to 1492)

In the gypsum sands of southern New Mexico, at what is now White Sands National Park, there are human footprints pressed into the mud of an ancient lakeshore. Most were made by teenagers and children. Seeds lying in the layers above and below them have been radiocarbon dated to roughly 21,000 to 23,000 years ago. If those dates hold (some archaeologists still question them), people were walking across North America many thousands of years earlier than the textbook story, which had them arriving from Asia around 13,000 to 16,000 years ago.

Either way, the land that became the United States was not empty and not new. By 1492 it had been home to people for at least fifteen thousand years, long enough for them to develop hundreds of distinct societies, languages and ways of life. "Native American" or "American Indian" is a label that lumps together peoples as different from one another as Norway is from Ethiopia.

Many Americas

Cahokia, across the Mississippi from modern St. Louis, is the place that most upsets the old picture of scattered wanderers. Around the year 1100 it was a planned city of plazas and earthen mounds. Its largest, Monks Mound, still stands about 30 metres high: the biggest earthwork north of Mexico. Estimates of its peak population vary with the method, mostly from about 10,000 to 20,000 people, which would make it one of the larger towns in the world at the time. By about 1350 it had been abandoned, for reasons archaeologists still argue over.

The Haudenosaunee Confederacy (the Iroquois) joined five nations of what is now upstate New York, the Mohawk, Oneida, Onondaga, Cayuga and Seneca; the Tuscarora became the sixth in 1722. Its oral history credits the Peacemaker (Dekanawida), Hiawatha and Jigonhsasee with founding it under the Great Law of Peace, an unwritten constitution governing a council of fifty chiefs. Proposed founding dates range from 1142 to the mid-1400s or later, and there is little agreement. Whether the Confederacy influenced the framers of the U.S. Constitution, as some historians and many Haudenosaunee argue, is also debated.

How many people?

Nobody knows how many people lived north of Mexico in 1492, and the guesses have swung wildly with each generation of scholars.

Ordinary life

For most people in most of these societies, life was organised around family, clan and season. In the farming villages of the East, women usually owned and worked the fields, and among the Haudenosaunee clan mothers chose and could remove the men who sat on the council: a kind of political power few European women had. Trade networks carried goods over enormous distances; archaeologists find Gulf Coast shells and Great Lakes copper hundreds of miles from where they began. War, slavery and conquest existed too, between Native nations as among European ones. These were not peoples outside history, waiting to be discovered, but peoples in the middle of their own. Many of their place names are still on the map, including the names of states: Massachusetts, Connecticut, Ohio, Michigan, Mississippi, the two Dakotas and Utah among them.

How many people, again?

Most current estimates fall between about 2.5 and 7 million. The low numbers of the early 20th century were partly an artefact: scholars counted the survivors of epidemics that had already swept the continent and assumed that was how things had always been. Whatever the starting figure, what followed was a demographic catastrophe, which the library's The Columbian Exchange describes in full.

The continent Europeans called a "new world" was an old one, crowded with nations that had their own wars, trade routes, diplomacy and histories. What was new was the arrival of people and germs from the other side of the ocean.

Part 2 — Colonies and slavery (1492–1763)

This part and Parts 5 to 8 describe slavery, the violent dispossession of Native nations, massacres and racial terror, including lynching. The descriptions are factual and not graphic, but they can be hard to read.

The first Europeans to plant lasting settlements in what became the United States were not English. Spain founded St. Augustine, in Florida, in 1565, and pushed north from Mexico into New Mexico, where in 1680 the Pueblo peoples rose up in a coordinated revolt and drove the Spanish out for twelve years. France built a trading empire along the St. Lawrence and Mississippi (the story of A Brief History of Canada, in this series). The Dutch held New Netherland, with its port of New Amsterdam on Manhattan, until the English took it in 1664 and renamed it New York.

England came late and came for different reasons. Jamestown, founded in Virginia in 1607 by the Virginia Company, a joint-stock business, was meant to make money. It nearly failed, until colonists discovered that tobacco grew well and sold well in Europe. The Pilgrims who landed at Plymouth in 1620, and the much larger Puritan migration that followed, came to build godly communities on their own terms. Later colonies had their own motives: Maryland as a haven for Catholics, Pennsylvania for Quakers, and Georgia, the last, was founded in 1732.

Two foundations at once

From the beginning, English America was built on two foundations that would shape everything after.

The first was self-government. Colonists governed themselves through elected assemblies, town meetings and juries far more than most people in Europe did. Land was abundant (because it was being taken from Native peoples), so a far larger share of white men owned property and could vote than in England. The habits of argument, petition and local control that later fuelled the Revolution were learned here.

The second was slavery. In 1619 an English privateer, the White Lion, landed "twenty and odd" Africans at Point Comfort in Virginia. They had been captured in Portuguese-backed raids on the Kingdom of Ndongo, in today's Angola. Whether they were treated as slaves for life or as servants is debated, since Virginia had no slave law yet, but over the following decades the colonies built one: slavery became lifelong, hereditary and racial. By the 18th century it was legal in every one of the thirteen colonies, in New York and Boston as well as Charleston.

The scale of the American slave system is often misunderstood. Of the roughly 12.5 million Africans forced onto slave ships for the Americas over more than three centuries, the great majority went to Brazil and the Caribbean. Only about 389,000, around 4 percent of those who survived the crossing, landed in mainland North America. The enslaved population of the United States grew mostly through births, which meant American slavery was a system for owning families, generation after generation.

Ordinary colonial life

Most colonists, free or enslaved, worked the land. A New England family farm grew its own food and traded a little; a Chesapeake tobacco plantation shipped its crop to London; a South Carolina rice plantation was worked by enslaved Africans, some of whom, many historians argue, brought rice-growing skills with them from West Africa. Many white immigrants arrived as indentured servants, working several years for whoever paid their passage. In 1676 frontier settlers, servants and some enslaved people joined Bacon's Rebellion against Virginia's governor; one long-standing (and debated) interpretation is that elites afterwards leaned harder on African slavery and on drawing a sharper line between white and Black workers.

Religion mattered enormously. Waves of revivals in the mid-18th century, later called the Great Awakening, sent itinerant preachers through every colony, split churches, and taught ordinary people that they could judge spiritual authority for themselves, a habit that carried over into politics. New England had some of the highest literacy rates in the world, thanks to Puritan insistence that everyone read the Bible, and by the mid-1700s colonial newspapers and almanacs, such as Benjamin Franklin's, circulated widely.

The colonies were also a meeting ground. Trade, alliances and intermarriage with Native nations shaped the frontier as much as war did. French and English empires competed for Native allies, and Native nations played the empires off against one another. That balance broke in the French and Indian War (1754–1763), the North American front of a world war between Britain and France. Britain won, took Canada and the land east of the Mississippi, and found itself with an enormous debt and a continent to police.

The same colonies that taught ordinary men to govern themselves also wrote the laws that made other men property. Neither foundation can be removed from the American story without the building falling down.

Part 3 — Revolution (1763–1783)

Britain's victory in 1763 created the conditions for its defeat. To pay its war debts and garrison its new territory, Parliament began taxing the colonies directly, through the Sugar Act, the Stamp Act of 1765 and duties on imports like tea. To keep the peace with Native nations, the Crown also tried to stop colonists settling west of the Appalachians. Both policies collided with what colonists had come to see as their rights as Englishmen: to be taxed only by their own assemblies, and to expand onto land they considered theirs for the taking.

The slogan "no taxation without representation" captured the first grievance. Protests escalated through the 1760s and 1770s: boycotts, riots, the Boston "Massacre" of 1770, the Boston Tea Party of 1773. Parliament responded with punitive laws, which colonists called the Intolerable Acts, meant to end self-government in Massachusetts. On 19 April 1775, British troops marching out of Boston exchanged fire with colonial militia at Lexington and Concord, and the war began.

The Declaration

On 2 July 1776 the Continental Congress voted for independence; on 4 July it adopted the Declaration, drafted mainly by Thomas Jefferson of Virginia and eventually signed by 56 delegates. Its second paragraph contains the most quoted sentence in American history:

"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness." — Declaration of Independence, 1776

Jefferson enslaved hundreds of people over his lifetime. The contradiction was noticed at the time, and it has been argued about ever since.

Winning the war

The Continental Army under George Washington survived for years mainly by not losing decisively. The turning point was the capture of a British army at Saratoga in October 1777, which encouraged France to sign an alliance with the United States in February 1778. French money, troops and ships made possible the siege of Yorktown, which ended with the surrender of a British army on 19 October 1781. By the Treaty of Paris, signed on 3 September 1783 by John Adams, Benjamin Franklin and John Jay, Britain recognised American independence, with a western boundary on the Mississippi.

Not everyone celebrated. Many colonists had stayed loyal to the Crown, and tens of thousands of these Loyalists left, many for what is now Canada. Many Native nations sided with Britain, judging that an independent United States would be hungrier for their land; they were not party to the peace treaty, and Britain largely abandoned them. Enslaved people, too, fled to British lines after the royal governor of Virginia, Lord Dunmore, offered freedom to those who escaped rebel masters to fight for the king, and some left with the British at the war's end.

Living through it

The war was fought in farmyards and towns, not on distant frontiers. Armies on both sides took food and fuel from civilians; Loyalist and Patriot neighbours burned each other out in the backcountry of the Carolinas and New York. Washington's soldiers went months without pay, and many without shoes, through hard winters in camp. Women ran farms and shops in their husbands' absence, followed the armies as cooks and nurses, and organised boycotts of British goods; a few fought in disguise. For many ordinary families, the Revolution was less a debate about rights than years of scarcity, fear and divided loyalties.

What kind of revolution?

Historians still argue about what the Revolution was, and the argument has become public.

Both sides of that last debate agree on more than the shouting suggests: slavery was central to the colonial economy, and the Declaration's words became a weapon that abolitionists, suffragists and civil rights activists later used against the very men who wrote them.

Part 4 — The Constitution and the early republic (1783–1828)

The first national government, under the Articles of Confederation (in force from 1781), was deliberately weak. It could not tax, could not regulate trade between the states, and needed nine states to agree on anything important. When indebted farmers in western Massachusetts rose in Shays' Rebellion, many leaders concluded that the union was failing.

From 25 May to 17 September 1787, 55 delegates met in Philadelphia, behind closed doors, and wrote a new constitution instead of amending the old one. It created a stronger national government split into three branches (Congress, the presidency and the courts), each able to check the others, and divided power again between the national government and the states. It came into force once nine states had ratified it; New Hampshire became the ninth in the summer of 1788. George Washington took office as the first president on 30 April 1789. A Bill of Rights, the first ten amendments, protecting speech, religion, the press, the right to bear arms, jury trial and more, was ratified on 15 December 1791.

The compromises

The Constitution was a bundle of bargains, and two of them shaped the next seventy years.

1. Large versus small states. The House of Representatives would be apportioned by population; the Senate would give every state two seats regardless of size. That bargain still governs American politics: by the Census Bureau's 2025 estimates, Wyoming's roughly 590,000 people elect as many senators as California's 39 million, nearly 67 times as many.
2. Slave versus free states. The words "slave" and "slavery" do not appear in the original document, but slavery is everywhere in it. The three-fifths clause counted three of every five enslaved people when apportioning House seats and electoral votes, giving slaveholding states extra power. Congress could not ban the import of slaves before 1808. A fugitive slave clause required escaped slaves to be returned.

Supporters of the Constitution argued their case in the essays later known as The Federalist, written by Alexander Hamilton, James Madison and John Jay. Opponents, the Anti-Federalists, feared a distant government that would swallow the states and the liberties of ordinary people. They lost the ratification fight but won the Bill of Rights, and their suspicion of central power never left American politics.

Parties, courts and a peaceful handover

The founders disliked political parties, and then immediately formed them. Hamilton's Federalists wanted a strong national government, a national bank and close ties with Britain; Jefferson and Madison's Democratic-Republicans wanted a more agrarian, decentralised republic and sympathised with revolutionary France. In 1798, during a naval conflict with France, the Federalists passed the Alien and Sedition Acts, which made it a crime to publish "false, scandalous and malicious" writing against the government. The election of 1800 was bitter, and its result, the transfer of power from Federalist John Adams to his rival Jefferson, was one of the first peaceful handovers between opposing parties in modern history.

In 1803 the Supreme Court, under Chief Justice John Marshall, decided Marbury v. Madison, establishing that federal courts can strike down laws that conflict with the Constitution. That power, judicial review, is not written explicitly in the text, and it made the Court the arena where many of the country's later fights would be decided.

A changing society

The Revolution's language worked on the country slowly. One by one, the Northern states abolished slavery, mostly through gradual laws that freed the children of enslaved mothers at adulthood, so that slavery became a Southern institution. Religious revivals swept the young republic, building new Baptist and Methodist churches that welcomed the poor, women and Black Americans, and fed the reform movements of the next generation, from temperance to abolition. Roads, canals and steamboats began to tie farms to distant markets. Women were shut out of voting and most property rights, but the idea that mothers had a civic duty to raise virtuous citizens gave them a public role, and arguments, that would grow.

In the early 19th century most states dropped property qualifications for voting by white men. The 1828 election of Andrew Jackson, a Tennessee planter, general and self-made "man of the people", is often taken as the start of a new, more democratic, more raucous era. It was also the start of the most systematic campaign yet to remove Native nations from the East.

Part 5 — Expansion and dispossession (1803–1890)

In 1803 Jefferson's government bought the Louisiana Territory from France for $15 million: about 828,000 square miles west of the Mississippi, at roughly four cents an acre. The purchase roughly doubled the size of the country. What France sold, though, was mainly its claim against other European empires. Almost all of that land was owned, lived on and governed by Native nations who had sold nothing.

The story of the next ninety years is how the United States turned paper claims into possession, and it has two sides that are both true. For millions of settlers, many of them poor immigrants, the West was a chance at land and independence that was unthinkable in Europe. For Native nations, it was invasion, broken treaties, war, starvation and removal.

Removal

In the Southeast, the Cherokee, Muscogee (Creek), Choctaw, Chickasaw and Seminole nations had farms, towns and, in the Cherokee case, a syllabary for writing their language (completed by Sequoyah around 1821), a written constitution (1827) and the first Native American newspaper, the Cherokee Phoenix (1828). Some wealthy Cherokee, like their white neighbours, also held enslaved Black people. White settlers in Georgia and neighbouring states wanted the land.

On 28 May 1830 President Andrew Jackson signed the Indian Removal Act, authorising him to negotiate the exchange of eastern Native lands for territory west of the Mississippi. His administration concluded almost 70 removal treaties. In 1832 the Supreme Court ruled in Worcester v. Georgia that Georgia's laws had no force inside the Cherokee Nation. Jackson did not enforce the decision. A small group of Cherokee leaders signed the Treaty of New Echota, which the Cherokee National Council never approved; the U.S. Senate ratified it in 1836. Most Cherokees rejected it, and in 1838–39 the army forced them west, some walking a thousand miles over four months.

Taking the West

In the 1840s expansion became a national creed that its champions called "manifest destiny". The United States annexed Texas, and the war with Mexico that followed (1846–48) ended with the Treaty of Guadalupe Hidalgo on 2 February 1848: Mexico ceded 55 percent of its territory, including present-day California, Nevada and Utah and most of Arizona, New Mexico and Colorado, for $15 million. Mexican citizens living in the ceded lands became Americans overnight, with treaty promises about their property that were often not kept. (The Mexican side of this story is in Mexico: A Condensed History.)

Gold was discovered in California the same year, and what followed there was among the darkest chapters of the whole expansion. California's Native population, already reduced by Spanish missions and disease to perhaps 150,000 by 1848, fell to about 30,000 by 1870. Historian Benjamin Madley counts between 9,492 and 16,094 Native people killed in direct violence between 1846 and 1873, and thousands more died of starvation or overwork; settlers held an estimated 10,000 to 27,000 Native people in forced labour, thousands of them children. In 1851 California's governor, Peter Burnett, told the legislature to expect "a war of extermination" until the state's Native peoples were gone. In 2019 the state's governor formally called it a genocide and apologised. Whether "genocide" fits the wider national record is a live scholarly debate; for California, many historians now use it.

Land for settlers, war on the Plains

The Homestead Act of 20 May 1862 offered 160 acres of surveyed public land to settlers who would live on and farm it. It was one of history's great land giveaways to ordinary people, though smaller than its legend: of some 500 million acres the government dispersed between 1862 and 1904, only about 80 million went to homesteaders. On 10 May 1869 the tracks of the first transcontinental railroad met at Promontory, Utah. On the western section, Chinese labourers, paid less than white workers, did most of the heavy manual work.

On the Great Plains, the Lakota, Cheyenne, Comanche and other nations, whose horse-and-bison way of life was itself a product of the Columbian Exchange, fought the longest. The 1868 Fort Laramie Treaty recognised a Great Sioux Reservation that included the Black Hills, "set aside for exclusive use" of the Sioux. In 1874 an army expedition under George Custer found gold there; miners poured in, the army moved against the Lakota, and after Custer's command was destroyed at the Little Bighorn in 1876 the government took the Black Hills in 1877. Ownership is still disputed today.

Meanwhile the bison, the Plains nations' food, shelter and economy, were shot almost out of existence: from tens of millions early in the century to a few hundred in the United States by 1889. Commercial hunters did most of the killing; some army officers and officials welcomed it as a way to force Native peoples onto reservations.

On 29 December 1890, at Wounded Knee Creek in South Dakota, U.S. soldiers killed between 250 and 300 Lakota, many of them women and children. It is usually taken as the end of the armed resistance, and the end of an era.

The last great instrument of dispossession was legal rather than military. The Dawes Act of 8 February 1887 broke up reservation land held in common into individual allotments and sold the "surplus" to settlers. Native-held land fell from about 138 million acres in 1887 to about 48 million by 1934, when the Indian Reorganization Act ended allotment.

Part 6 — Cotton, slavery and the road to war (1820–1861)

In 1794 Eli Whitney patented a cotton gin that could clean up to fifty pounds of cotton a day. Raw cotton output then doubled every decade after 1800. By the middle of the century the American South grew about three-quarters of the world's cotton and supplied three-fifths of all U.S. exports. Britain's mills, and New England's, ran on it.

The gin did not reduce the need for enslaved labour; it multiplied it. Planters moved west into Alabama, Mississippi, Louisiana and Texas, onto land taken from the removed nations. About a million enslaved people were forcibly moved from the older states of the Upper South to the new cotton lands, many sold away from their families, in what the historian Ira Berlin called the Second Middle Passage.

By 1860 the people held in slavery were valued, as property, at more than $3 billion, an immense sum for the time. That is why slaveholders fought so hard to protect slavery and extend it into new territory: new slave states meant more votes in Congress, and new land meant demand for the people they owned.

Lives under slavery

Enslaved people worked from first light to dark in gangs under overseers, faced the whip and the constant threat of sale, and had no legal right to marriage, to learning to read, or to their own children. They also built a life the system could not erase: families held together across plantations, a Black Christianity of spirituals and secret worship, music, folk knowledge and constant, mostly quiet resistance, from slowing work to running away. Some, like Harriet Tubman, escaped and went back to lead others north. Others, like Frederick Douglass, escaped and became the abolition movement's most powerful voices.

An American culture

The decades before the war were also when the country found a literary voice of its own. Ralph Waldo Emerson and Henry David Thoreau argued for self-reliance and conscience against conformity; Herman Melville and Nathaniel Hawthorne wrote about sin, obsession and the American soul; Walt Whitman wrote poems that tried to contain a whole democratic people. Harriet Beecher Stowe's novel Uncle Tom's Cabin turned the cruelty of slavery into a story millions of Northern readers wept over. Frederick Douglass's Narrative of his own life in slavery did the same from inside. Popular entertainment, meanwhile, was dominated by the minstrel show, in which white performers in blackface mocked Black Americans, an origin of American popular music that the country is still reckoning with.

A house dividing

The sectional fight over slavery's expansion shaped every decade before the war.

Many white Northerners were not abolitionists, and many shared the era's racism. But the Fugitive Slave Act brought slavery into their own towns, and Dred Scott suggested that nothing could stop slavery spreading. A new Republican Party formed around one idea: no more slave territory.

Northern society was changing fast in the same years. Factories, canals and railroads were spreading; cities filled with immigrants, above all Irish Catholics fleeing famine and Germans, who met a fierce nativist backlash. The North was becoming a society of wage labour and small farms; the South remained one of plantations and slavery. Each came to see the other as a threat to its way of life.

On 6 November 1860 Abraham Lincoln won the presidency with 39.7 percent of the popular vote and every electoral vote from the free states. He was not even on the ballot in ten Southern states. Before he took office on 4 March 1861, seven states had seceded: South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana and Texas. Their own documents were explicit; Mississippi's declared its position "thoroughly identified with the institution of slavery". The later "Lost Cause" story, that the war was mainly about states' rights or tariffs, is rejected by the overwhelming majority of historians. On 12 April 1861 Confederate forces opened fire on Fort Sumter, in Charleston harbour.

Part 7 — Civil War and Reconstruction (1861–1877)

After Fort Sumter, four more states joined the Confederacy, including Virginia, and the war became the bloodiest in American history. The North had far more people, most of the factories and most of the railroads. The South had the advantage of fighting on its own ground, needing only not to lose, and some of the war's ablest generals, above all Robert E. Lee.

A war that changed its purpose

Lincoln began the war to save the Union, not to end slavery. Enslaved people forced the question by fleeing to Union lines wherever the armies came near. On 1 January 1863 the Emancipation Proclamation declared free all enslaved people in the areas still in rebellion. It did not apply to the loyal border states or to Confederate areas already under Union control, and it could only be enforced as Union armies advanced. But it changed what the war was for, and it opened the army to Black men. By the end of the war almost 200,000 Black soldiers and sailors had fought for the Union.

On 9 April 1865 Lee surrendered to Ulysses S. Grant at Appomattox Court House, Virginia. Five days later, on the evening of 14 April, the actor and Confederate sympathiser John Wilkes Booth shot Lincoln at Ford's Theatre in Washington; he died the next morning.

For scale: about 405,000 Americans died in the Second World War, out of a population more than four times larger.

The war reached deep into civilian life. Both sides introduced conscription; in the North, men could pay for a substitute, which fed the anger of the July 1863 draft riots in New York City, where mobs attacked Black residents. Women ran farms and businesses, and thousands served as nurses, among them Clara Barton, who went on to found the American Red Cross. In the South, Union blockades and the destruction of farms and railways brought hunger and inflation, and the march of William T. Sherman's army through Georgia in 1864 deliberately destroyed the Confederacy's capacity to keep fighting.

The second founding

Between 1865 and 1870 the country amended its Constitution three times, in ways the historian Eric Foner calls a "second founding".

1. The 13th Amendment (ratified 6 December 1865) abolished slavery, "except as a punishment for crime whereof the party shall have been duly convicted", an exception later exploited by Southern convict-leasing systems.
2. The 14th Amendment (ratified July 1868) made everyone born or naturalised in the United States a citizen and barred states from denying any person "due process of law" or "the equal protection of the laws". It became the foundation of most modern civil rights law, and it is the amendment the Supreme Court applied to birthright citizenship in 2026.
3. The 15th Amendment (ratified 3 February 1870) barred denying the vote on account of race.

Reconstruction and its overthrow

Lincoln's successor, Andrew Johnson of Tennessee, wanted a quick and lenient readmission of the Southern states, which promptly passed "Black Codes" restricting freedpeople's lives. Congress, controlled by Radical Republicans, took over. The Reconstruction Acts of 1867 put most of the former Confederacy under military districts and required new state constitutions guaranteeing Black men the vote. The House impeached Johnson in February 1868; the Senate acquitted him by one vote.

For a few years the South saw something unprecedented: biracial democracy. Black men voted in large numbers and served in state legislatures and, from 1870, in Congress: 22 Black men sat in Congress between 1870 and 1901. A federal Freedmen's Bureau provided food and shelter to the newly freed, and Black churches, schools and colleges multiplied.

It was destroyed by terror and by Northern fatigue. The Ku Klux Klan and similar groups murdered Black voters and officeholders and their white allies. The disputed presidential election of 1876 was resolved by the informal Compromise of 1877: Republican Rutherford B. Hayes took the presidency, and the last federal troops were withdrawn from Southern politics. "Redeemer" Democrats took over the Southern states. From the 1890s they used literacy tests, "grandfather clauses" and violence to strip Black citizens of the vote; by 1905 most Black Southerners were effectively disenfranchised. After George White of North Carolina left Congress in 1901, no Black American was elected to it again until 1928.

Reconstruction is the hinge of American history. For a decade the country tried to make the promise of 1776 real for everyone, and then it stopped trying for most of a century.

How Reconstruction is remembered has itself been contested. For decades, textbooks influenced by the "Dunning School" portrayed it as a corrupt mistake imposed on a defeated South. Since the 1960s, and especially since Foner's work, most historians see it as a noble, unfinished experiment defeated by violence.

Part 8 — Industry, immigration and empire (1877–1914)

In the half-century after the Civil War the United States became the largest economy in the world. By the Maddison Project's long-run estimates, the American economy had already passed Britain's by about 1870 and passed China's by the late 1880s. By 1913 it was more than twice Britain's size.

This was the age of railroads, steel, oil, electricity and the telephone. Andrew Carnegie's steel mills, John D. Rockefeller's Standard Oil and J. P. Morgan's banks built fortunes larger than any before them. Standard Oil was organised in 1882 as a "trust", a structure that let one board run a web of nominally separate companies as a single monopoly. Mark Twain gave the era its name: the Gilded Age, golden on the surface, base metal underneath.

Who did the work

The workers were increasingly immigrants. Between 1892 and 1924 more than 12 million people were processed through the federal immigration station on Ellis Island in New York harbour alone. The peak year was 1907, when nearly 1.3 million people entered the country. Most of the new arrivals came not from Britain, Ireland and Germany, as before, but from Italy, Poland, Russia's Jewish Pale, Greece and the Austro-Hungarian Empire. The foreign-born share of the population reached 14.8 percent in 1890 and 14.7 percent in 1910, a share matched again only in recent years.

Life in the industrial cities was hard. Families crowded into tenements, children worked in mills and mines, and twelve-hour days were common. Workers organised, and strikes were often met with private guards, state militias or federal troops. Reformers, the Progressives, fought back through journalism, the vote and the law: the Sherman Anti-Trust Act of 1890 made monopolising trade illegal (it was used against Standard Oil by 1911); the 16th Amendment (1913) allowed a federal income tax; the 17th (1913) let voters, not state legislatures, elect senators.

Not every newcomer was welcome. The Chinese Exclusion Act of 6 May 1882 suspended the immigration of Chinese labourers and barred Chinese immigrants from citizenship, the first major law restricting immigration by nationality. It was extended and made permanent, and repealed only in 1943.

A new way of living

By the 1910s American cities had electric light, streetcars, telephones, department stores, mass-circulation newspapers and, soon, cinemas. Baseball became the national game. Settlement houses, the most famous Jane Addams's Hull House in Chicago, offered immigrants classes and help, and trained a generation of women reformers. In New Orleans, Black musicians fused blues, ragtime, brass-band music and church singing into jazz, the first of the American musical forms, from blues to rock and roll to hip hop, that would go on to conquer the world. Almost all of them were born in Black communities.

The Jim Crow South and the Great Migration

In the South, the "separate but equal" doctrine was blessed by the Supreme Court in Plessy v. Ferguson (18 May 1896), which upheld a Louisiana law segregating railway cars. Justice John Marshall Harlan dissented alone:

"Our constitution is color-blind, and neither knows nor tolerates classes among citizens." — Justice Harlan, dissenting in Plessy v. Ferguson (1896)

Segregation was enforced by law and by terror. The Equal Justice Initiative has documented more than 4,000 racial terror lynchings of Black Americans in twelve Southern states between 1877 and 1950. Beginning in the 1910s, Black Southerners voted with their feet: in the Great Migration, about six million people moved to the cities of the North, Midwest and West between the 1910s and the 1970s, remaking Chicago, Detroit, New York and Los Angeles, and American music, politics and culture with them.

An overseas empire

The closing of the continental frontier coincided with a reach overseas. In January 1893 American businessmen, backed by the U.S. minister and Marines from a U.S. warship, overthrew Queen Lili'uokalani of Hawaii; the islands were annexed in July 1898. That year the Spanish-American War, triggered after the battleship Maine exploded in Havana harbour, lasted under four months. By the Treaty of Paris (10 December 1898) Spain ceded Puerto Rico and Guam and sold the Philippines to the United States for $20 million. The Senate ratified it by a single vote, after a fierce debate between those who saw a duty or an opportunity and anti-imperialists who saw a republic betraying itself. Filipinos who had been fighting Spain for independence then fought the United States in a long, brutal war (the story is in Philippines: A Condensed History).

Part 9 — World wars, the Depression and the New Deal (1914–1945)

When war broke out in Europe in 1914, most Americans wanted no part of it. Germany's renewed unrestricted submarine warfare in February 1917, and the "Zimmermann Telegram", a German proposal to Mexico for an alliance against the United States, changed that. On 2 April 1917 President Woodrow Wilson asked Congress for war, saying "the world must be made safe for democracy." American troops arrived late, but in large enough numbers to help tip the balance in 1918. About 116,500 Americans died in the war; the influenza pandemic that followed killed about 675,000 at home.

At home, the war years and the decade after brought quick, uneven change. Women won the vote nationally with the 19th Amendment, ratified on 18 August 1920, though many Black women in the South remained barred by state laws for decades more. Congress shut the door on mass immigration with the 1924 Immigration Act, which set quotas of 2 percent of each nationality counted in the 1890 census (deliberately favouring northwestern Europeans) and excluded Asian immigrants entirely. The 1920s were a decade of radio, cars, jazz, film, the Harlem Renaissance and booming stock prices, and also of a revived Ku Klux Klan and fierce cultural conflict between city and countryside.

The crash

The stock market crashed in the autumn of 1929, and the economy fell off a cliff. By the Maddison Project's estimates, real output fell by about 30 percent between 1929 and 1933. Thousands of banks failed, wiping out savers who had no deposit insurance. Unemployment, which no agency measured officially at the time, is estimated to have reached about a quarter of the workforce in 1933. On the southern Plains, drought and over-ploughed soil produced the Dust Bowl.

The unemployment figure is a later reconstruction: the economist Stanley Lebergott put the 1933 peak at 24.9 percent; another estimate, by Michael Darby, at 22.5 percent in 1932.

The New Deal

Franklin D. Roosevelt, a Democrat, took office in 1933 and over the next six years built the modern American state. The New Deal included, among much else:

• federal deposit insurance and new rules for banks and stock markets;
• public works and job programmes that built dams, schools, roads and parks, and the Tennessee Valley Authority (1933), which brought electricity to one of the poorest regions;
• the Social Security Act (14 August 1935), creating old-age pensions and unemployment insurance;
• the National Labor Relations Act (5 July 1935), guaranteeing workers the right to organise and bargain collectively, which drove a surge in union membership.

The New Deal did not end the Depression; the war did. Its defenders argue it saved American capitalism and democracy at a moment when much of the world turned to fascism or communism, and built protections that still define ordinary life. Its critics, then and now, argue that it expanded federal power beyond what the Constitution intended, and that some policies prolonged the slump. A third critique comes from the left and from historians of race: the Social Security Act excluded agricultural and domestic workers, which in practice left out most Black workers in the South, and federal housing programmes systematically denied mortgages in Black neighbourhoods ("redlining"), a legacy still visible in the racial wealth gap.

The Second World War

The United States stayed formally neutral as war engulfed Europe and Asia, while aiding Britain through Lend-Lease (1941). On 7 December 1941 Japan attacked the U.S. fleet at Pearl Harbor in Hawaii, killing or wounding more than 3,500 Americans. Congress declared war the next day, with a single dissenting vote in the House; Germany declared war on the United States days later.

The war transformed the country. Factories turned out ships, planes and tanks at a pace no other country matched. Women entered industrial jobs in huge numbers. After protests by Black leaders against discrimination in war work, Roosevelt's Executive Order 8802 (June 1941) banned it in defence industries. Black soldiers fought in a segregated army, abroad against an enemy preaching racial supremacy.

The war also produced one of the gravest civil liberties violations in American history. Executive Order 9066 (19 February 1942) led to the forced removal of about 122,000 people of Japanese ancestry from the West Coast into camps; nearly 70,000 of them were American citizens. The Supreme Court upheld the policy. In 1988 Congress formally apologised and paid $20,000 to each surviving internee.

The Manhattan Project built the first atomic bombs. On 6 August 1945 one destroyed Hiroshima; on 9 August another destroyed Nagasaki. Between them they killed somewhere between 150,000 and 246,000 people by the end of 1945. Japan surrendered, formally, on 2 September 1945. Whether the bombings were necessary to end the war without a costly invasion, or whether Japan was already close to surrender, remains one of the most argued questions in modern history.

About 405,000 Americans died in the Second World War. The country came out of it with intact cities, the atomic bomb and no rival among the democracies; five years later it was producing more than a quarter of the world's output.

Part 10 — Superpower, Cold War and civil rights (1945–1974)

In 1950, by the Maddison estimates, the American economy produced about 27 percent of everything made on Earth. The country that had refused to join the League of Nations now led the founding of the United Nations, and quickly found itself in a global rivalry with the Soviet Union.

Containment

In March 1947 President Harry Truman told Congress that it must be "the policy of the United States to support free peoples who are resisting attempted subjugation", and asked for $400 million for Greece and Turkey. The Marshall Plan, signed in April 1948, gave $13.3 billion over four years to rebuild Western Europe. The United States led the founding of NATO, rebuilt occupied Japan and West Germany as allies, and fought a war in Korea (1950–53) in which about 36,500 Americans died.

The Cold War reshaped domestic life too. Fear of Soviet espionage, some of it real, fed a "Red Scare". In February 1950 Senator Joseph McCarthy claimed to have a list of 205 Communists in the State Department; he offered little proof but ruined many careers before the Senate censured him on 2 December 1954. In October 1962 the discovery of Soviet nuclear missiles in Cuba brought the world closer to nuclear war than at any other time; the crisis ended after two weeks when Khrushchev agreed to withdraw the missiles, the U.S. promised not to invade Cuba and, privately, agreed to remove its own missiles from Turkey.

The affluent society

For tens of millions of Americans, the postwar decades were the best economic times in history. The G.I. Bill (1944) sent about 2.3 million veterans to college and backed 4.3 million home loans by 1955. Suburbs spread around every city. The Interstate Highway Act of 1956 authorised a 41,000-mile network of motorways. Television, washing machines and two-car garages spread. Factory workers in unions could buy homes and send children to college on a single income. A baby boom pushed the fertility rate to about 3.7 children per woman in 1960; it is about 1.6 today.

That prosperity was unequally shared. Many of the new suburbs used restrictive covenants and federal mortgage rules to exclude Black families, so Black Americans were largely shut out of the era's biggest engine of family wealth, home ownership.

The civil rights revolution

The movement that overthrew legal segregation was built over decades by lawyers, churches, unions, students and ordinary people.

The results were rapid in law and slower in life. By the end of 1965 a quarter of a million new Black voters had registered. The movement also inspired others: the women's movement, Mexican American farmworkers, Native activists, and gay Americans all drew on its methods and language.

Lyndon Johnson, who took office after John F. Kennedy's assassination in November 1963, used his legislative skill to pass not only the civil rights laws but the "Great Society": Medicare and Medicaid (30 July 1965), federal aid to schools, and the war on poverty. The Immigration and Nationality Act of October 1965 abolished the national-origins quotas of the 1920s. It transformed the country, as immigration from Asia, Latin America and later Africa rose and the foreign-born share climbed from about 5 percent in 1965 to about 14 percent by 2016.

Vietnam and the breaking of trust

The same years brought the war that broke the postwar consensus. After the Gulf of Tonkin Resolution in August 1964, which only two senators opposed, Johnson escalated U.S. involvement in Vietnam. American troop numbers peaked at about 543,000 in 1969. More than 58,000 Americans died, and estimates of Vietnamese dead range from under one million to around three million. The war divided a generation, fuelled a mass antiwar movement and destroyed Johnson's presidency.

His successor, Richard Nixon, wound down U.S. ground combat in Vietnam and opened relations with Communist China. He was also brought down by the Watergate scandal, which began with a break-in at Democratic headquarters on 17 June 1972 and ended, after the Supreme Court ordered him to hand over his secret tapes, with his resignation on 9 August 1974. Two years earlier American astronauts had walked on the Moon (20 July 1969). The country that could do that could no longer agree on much else.

Part 11 — From the 1970s to the 2000s (1974–2008)

The 1970s were a decade of humbling. The 1973 Arab oil embargo first doubled and then quadrupled oil prices. Inflation reached 11 percent in 1974 and 13.5 percent in 1980, while unemployment also rose, a combination ("stagflation") the economics of the time said should not happen. Saigon fell to North Vietnamese forces on 30 April 1975. In November 1979 Iranian revolutionaries seized the U.S. embassy in Tehran and held 52 Americans hostage for 444 days; they were freed minutes after Ronald Reagan's inauguration on 20 January 1981.

The Reagan era

Reagan, a former actor and governor of California, won by promising to restore national confidence and shrink government: "government is not the solution to our problem; government is the problem," he said in his first inaugural address. His administration cut income tax rates sharply, deregulated industries, confronted unions and built up the military, while the Federal Reserve broke inflation with punishing interest rates and a deep recession in 1981–82.

How to judge it is one of the clearest left-right divides in American history. Supporters credit Reagan with ending stagflation, launching a long boom and, through pressure and then diplomacy with Mikhail Gorbachev, helping end the Cold War on Western terms. Critics point to a federal debt that more than tripled between 1980 and 1989 (from $914 billion to $2.7 trillion), the weakening of unions (Reagan fired more than 10,000 striking air traffic controllers in 1981), and the start of a long rise in inequality. Both sides agree he changed the terms of debate for a generation: the next Democratic president, Bill Clinton, declared in 1996 that "the era of big government is over."

The Berlin Wall fell in November 1989; Gorbachev resigned and the Soviet Union dissolved in December 1991. The United States was, briefly, the only superpower.

The 1990s

The 1990s combined a long boom, the birth of the commercial internet, and the North American Free Trade Agreement with Canada and Mexico (in force from 1 January 1994). Clinton was impeached by the House in December 1998 for perjury and obstruction of justice over an affair with a White House intern, and acquitted by the Senate in February 1999.

Underneath the boom, the economy was being reshaped. Manufacturing employment fell as production moved abroad and machines replaced workers; finance and technology boomed; and the gains went increasingly to those with college degrees, capital and the right postcodes. The condensed piece in this library summarises the result: an economy "unmatched at generating aggregate wealth and innovation, persistently uneven at distributing it."

Culture wars and new technologies

Social change after the 1960s produced its own counter-movement. Roe v. Wade (1973), which established a constitutional right to abortion, the spread of no-fault divorce, and the gay rights movement mobilised a new religious right, mostly evangelical Protestants and conservative Catholics, which became a core part of the Republican coalition from Reagan onward. Prison populations grew for three decades, driven largely by tougher sentencing laws, until by 2008 about one American adult in a hundred was behind bars, among the highest rates in the world; violent crime fell from the early 1990s. Whether mass incarceration caused much of that fall, and whether its costs, borne heavily by Black and poor communities, were worth it, became an argument of its own. In the Bronx in the 1970s, Black and Latino teenagers invented hip hop. In California garages and university labs, the personal computer and then the internet turned into industries that would make American technology companies the most valuable on Earth.

The new century

The 2000 election was decided by a few hundred votes in Florida and a 5–4 Supreme Court ruling, Bush v. Gore (12 December 2000), that ended the recount. George W. Bush won the Electoral College while losing the national popular vote.

On 11 September 2001, nineteen al-Qaeda hijackers flew passenger jets into the World Trade Center and the Pentagon; a fourth plane crashed in Pennsylvania. The attacks killed 2,977 people from 90 nations. The United States invaded Afghanistan in October 2001 and, on 20 March 2003, invaded Iraq, citing claims that Saddam Hussein possessed weapons of mass destruction. No such stockpiles were found.

Estimates of Iraqi deaths vary enormously by method: from about 100,000 to 115,000 recorded civilian deaths (Iraq Body Count) to 400,000 to more than 600,000 total deaths in household-survey studies. The wars, the treatment of detainees and the failure to find weapons damaged American standing abroad and trust in government at home.

By 2008 the United States had won the Cold War and lost something harder to measure: the confidence, shared across parties, that its institutions told the truth and worked for ordinary people.

Part 12 — Polarisation and the present (2008–2026)

The financial crisis that began in 2007, when a bubble in American housing and mortgage lending burst, became the worst economic downturn since the 1930s. The recession officially ran from December 2007 to June 2009. About 8.7 million jobs disappeared, unemployment peaked at 10 percent in October 2009, and Congress authorised a $700 billion rescue fund for the banks. Millions lost homes. Many Americans concluded that the people who caused the crisis had been bailed out and those who suffered from it had not; that feeling powered movements on both the right (the Tea Party) and the left (Occupy Wall Street).

In November 2008 Barack Obama, a Democrat, was elected the first African American president, with 52.9 percent of the vote. His Affordable Care Act (23 March 2010) extended health insurance to some twenty million people and became the most fought-over domestic law of the era. In 2015 the Supreme Court recognised a constitutional right to same-sex marriage in Obergefell v. Hodges (5–4).

Two Americas, two stories

In 2016 Donald Trump, a New York property developer and television personality who had never held office, won the presidency on a platform of restricting immigration, raising tariffs and "America First". He lost the popular vote to Hillary Clinton by about 2.9 million votes but won the Electoral College, 304 to 227. His supporters saw a long-overdue revolt against a political class that had shipped jobs abroad, ignored the communities left behind and looked down on their values. His opponents saw a threat to democratic norms, a coarsening of public life and an appeal to racial and nativist resentment. Both groups were large, and they increasingly lived in different places, watched different media and trusted different facts.

On 20 January 2025, his first day back in office, Trump pardoned or commuted the sentences of all those charged over the January 6 attack. He became only the second president, after Grover Cleveland, to win non-consecutive terms.

The United States in 2026

Here is the state of affairs as of late October 2026, from dated sources, with the main lines of argument. It will date quickly.

Population and people. The World Bank puts the 2025 population at about 341.8 million. The share born abroad is about 15 percent (2024), back near the record levels of 1890–1910. Net international migration, by the Census Bureau's estimates, fell from a peak of 2.7 million in 2024 to 1.3 million in the year to mid-2025, and was projected to fall to about 321,000 in 2026: the result of both less immigration and more emigration, under very different policy regimes. Life expectancy (78.9 years in 2024) remains several years below most other rich countries; fertility (1.6) is below replacement, as in most of them.

Economy. At about $30.8 trillion in 2025 (World Bank, current dollars), the U.S. economy is the world's largest at market exchange rates, at about $90,000 per person. Measured at purchasing-power parity, China's economy has been larger since about 2014, by the Maddison estimates. The administration's sweeping tariffs have been the central economic argument of 2025–26: supporters say they protect industry, bring back jobs and give leverage in negotiations; critics, including many economists, say they function as a tax on American consumers and businesses and invite retaliation. On 20 February 2026, in Learning Resources, Inc. v. Trump, the Supreme Court held 6–3 that the International Emergency Economic Powers Act "does not authorize the President to impose tariffs"; the administration turned to other trade laws to keep many of them in place.

Courts and the Constitution. Two other rulings of the 2025–26 term show how many old questions are live again. In Louisiana v. Callais (29 April 2026), the Court held 6–3 that Louisiana's second majority-Black congressional district was an unconstitutional racial gerrymander, because the Voting Rights Act had not required it; analysts expect the ruling to reshape districts across the South. In Trump v. Barbara (30 June 2026) the Court held that children born in the United States to parents who are in the country unlawfully or temporarily are "citizens at birth" under the Fourteenth Amendment, rejecting the administration's executive order to the contrary.

Immigration enforcement. The administration's large-scale deportation drive, including surges of federal immigration agents into particular cities and states, is the most visible domestic fight of the period. Supporters say it restores the rule of law after years of record border crossings; opponents point to wrongful detentions and to fatal shootings by federal immigration agents in Minneapolis in January 2026, and argue that it violates civil liberties.

War and the world. On 3 January 2026 U.S. forces raided Caracas and seized Venezuela's president, Nicolás Maduro, who was flown to New York to face drug-trafficking charges; he pleaded not guilty. The administration called it a law-enforcement operation; many governments and international lawyers called it a violation of the UN Charter. On 28 February 2026 the United States and Israel launched strikes on Iran, and Iran counterattacked Israel, U.S. bases and neighbouring states. A ceasefire in April and a memorandum signed through Pakistani mediation in June did not end the conflict; as of a UN Security Council debate on 27 October 2026, diplomacy over Iran's nuclear programme and over the war's aftermath remained unresolved, with Council members sharply divided. The government also withdrew from the World Health Organization and dozens of other international bodies in January 2026.

Politics. A record 43-day federal shutdown ran from 1 October to 12 November 2025. Both parties fought over mid-decade redistricting in several states ahead of the midterm elections due on 3 November 2026 (still to come as this was written, at the end of October 2026), with all 435 House seats, 35 Senate seats and 36 state governorships on the ballot. The country celebrated its 250th birthday on 4 July 2026 with events from Philadelphia to New York harbour, and argued, characteristically, over whether the official celebrations had become too political.

Science. In April 2026 NASA's Artemis II carried four astronauts, three American and one Canadian, around the Moon and back: the first crewed lunar flight in more than fifty years.

The questions Americans fought over in 2026 (who is a citizen, how much power a president holds, what the Voting Rights Act requires, whether to fight abroad) are recognisably the ones of 1787, 1868 and 1965. The answers keep changing; the questions don't.

Part 13 — How to understand the United States today

Key dates

Who's who

Five ideas that unlock the country

1. It is a nation founded on an argument, not an ethnicity. Most nations explain themselves by blood, language or soil. The United States explains itself by a set of propositions in the Declaration and the Constitution, which is why its politics so often turn into fights over what those texts mean. Conservatives tend to emphasise fidelity to the founders' original meaning; liberals tend to emphasise the principles the founders stated but did not live up to. Both are arguing inside the same tradition, which is itself a source of unity.

2. Race and slavery are not a side story. Slavery shaped the Constitution, caused the Civil War, defined the South's politics for a century after, and drove the civil rights revolution that reshaped both parties in the 1960s. You cannot understand American geography, wealth, music, religion or elections without it. How central to make it in the national story is itself a live and bitter argument, as the 1619 and 1776 projects showed.

3. Land came from Native nations. The United States grew from thirteen coastal colonies to a continent by purchase, war, treaty and removal, almost all of it at the expense of Native peoples. Today the federal government recognises 575 tribes and Alaska Native villages, many with their own governments, courts and lands (the Bureau of Indian Affairs administers about 55 million acres in trust): a living reminder that the story did not end in 1890.

4. Federalism and checks are features, not bugs. Power is split between Washington and fifty states, and among Congress, the president and the courts, because the founders feared concentrated power more than gridlock. That design makes sweeping change slow, gives the Supreme Court enormous weight, and lets states run very different experiments, from abortion law to taxes. Every era's fights (over slavery, the New Deal, civil rights, tariffs, immigration) are also fights over who gets to decide.

5. Immigration is the engine and the flashpoint. The United States has taken in more immigrants than any country in history, and each wave, Irish and German, Chinese, Italian and Jewish, Mexican and Asian, has met a backlash before becoming part of "us". The 1924 quotas and the 1965 reopening were the two great hinge laws; the 2025–26 enforcement drive and the falling migration numbers are the newest turn of the same wheel.

The United States has never been one story. It has been, at the same time, a refuge and a conquest, a democracy and a slave republic, a nation of immigrants and a nation that kept closing its doors. Every generation has had to decide which of those stories to carry forward.

The takeaway

The United States was built on land taken from Native nations, with a constitution that protected slavery and a Declaration that condemned the idea of anyone ruling another without consent. Its history is the collision of those foundations: a continental expansion and dispossession, a civil war that killed some 620,000 to 750,000 people and ended slavery, a Reconstruction that briefly made multiracial democracy real and was then overthrown, an industrial and immigrant boom that made it the world's largest economy, a New Deal and two world wars that made it a superpower, and a civil rights revolution within living memory. At 250, in 2026, Americans were still arguing in court and at the ballot box over who is a citizen, how much power a president holds, and who gets to vote: the same questions, in new forms, that the founders left open.

Try this: pick one founding document from the National Archives' list of milestone documents (the Declaration, the 14th Amendment, the Voting Rights Act) and read it in full; most take under ten minutes. Then find one news story from this week that turns on what that document means. You will be reading American history the way Americans actually live it: as an argument still going on.

Sources & Further Reading

Sources
- U.S. National Archives, Milestone Documents (archives.gov): texts and explanatory notes for the Declaration, Constitution, Bill of Rights, Louisiana Purchase, Indian Removal Act, Treaty of Guadalupe Hidalgo, Missouri Compromise, Dred Scott, Emancipation Proclamation, 13th–15th and 19th Amendments, Homestead Act, Fort Laramie Treaty, Dawes Act, Chinese Exclusion Act, Plessy, Hawaii annexation, Social Security and National Labor Relations Acts, Executive Orders 8802, 9066, 9981 and 10730, the G.I. Bill, Marshall Plan, Brown, Civil Rights Act, Voting Rights Act and Medicare; and the Vietnam casualty file (58,220).
- U.S. Department of State, Office of the Historian: the 1924 Immigration Act, the Spanish-American War, the Truman Doctrine, the Cuban missile crisis, the 1973 oil embargo and the collapse of the Soviet Union.
- National Park Service: White Sands footprints, Jamestown, Ellis Island, the transcontinental railroad. U.S. House of Representatives, Black Americans in Congress (Black members 1870–1901).
- U.S. Census Bureau: decennial census totals; Historical Census Statistics on the Foreign-Born Population (Working Paper 29); "New Population Estimates Show Decline in Net International Migration" (27 January 2026).
- World Bank, World Development Indicators (updated October 2026): population, GDP, GDP per person, inflation, life expectancy, fertility, migrant share. Maddison Project Database (University of Groningen), via Our World in Data: long-run GDP and GDP per person.
- Supreme Court of the United States, slip opinions: Learning Resources, Inc. v. Trump (20 Feb 2026), Louisiana v. Callais (29 Apr 2026), Trump v. Barbara (30 June 2026). UN press release SC/16491 (27 Oct 2026) on the Security Council's Iran debate. NASA mission page for Artemis II.
- American Battlefield Trust (Civil War deaths, traditional count); J. David Hacker, "A Census-Based Count of the Civil War Dead" (Civil War History, 2011); Equal Justice Initiative, Lynching in America; Benjamin Madley, An American Genocide (2016), for California figures; 9/11 Memorial & Museum; CDC (1918 influenza).
- Pre-1492 population estimates, Cahokia, colonial population, and some events of 2025–26 (the Venezuela raid, the Iran war's chronology, the shutdown, election results) were taken from Wikipedia summaries of cited scholarship and reporting, cross-checked where possible against the official sources above. Figures where scholars disagree are given as ranges.

Go deeper
- 📘 These Truths: A History of the United States — Jill Lepore (the best single-volume history; organised around the gap between the founding ideals and the country's practice)
- 📘 The Rediscovery of America: Native Peoples and the Unmaking of U.S. History — Ned Blackhawk (the whole national story retold with Native nations at the centre, not the margins)
- 📘 Battle Cry of Freedom — James M. McPherson (the classic one-volume history of the Civil War era)
- 📘 The Second Founding — Eric Foner (short and clear on how the Reconstruction amendments remade the Constitution, and how they were undermined)
- 📘 Freedom from Fear — David M. Kennedy (the Depression, the New Deal and the Second World War in one strong volume)
- 🌐 National Archives: Milestone Documents (read the founding texts themselves, each with a short explanation)
- 🌐 Equal Justice Initiative: Lynching in America (the documented history behind the Jim Crow era)
- 🌐 Related pieces in this library: United States: A Condensed History and Mexico: A Condensed History; A Brief History of Canada (this series); The Columbian Exchange; Rights, Constitutions & the Rule of Law