Thoreau's 'Civil Disobedience' was largely a protest against the Mexican-American War

Read Thoreau's 'Civil Disobedience'

The essay—originally delivered as a lecture and inspired by a night in jail for failing to pay a poll tax—argued that citizens should nonviolently resist unjust government policies, including slavery. Read the entirety of the essay for free.

The long-tail influence of Thoreau's 'Civil Disobedience'

His essay "Civil Disobedience" laid out both a practical and a moral plan for resisting unjust governments, inspiring civil rights leaders like Mahatma Gandhi and Martin Luther King Jr., as well as anti-war anarchists like Emma Goldman and literary figures like Leo Tolstoy.

The political theory of Henry David Thoreau

The two years, two months, and two days that Thoreau spent living in a modest cabin at Walden Pond informed his beliefs that people should live simply, deliberately, and become self-reliant. Those beliefs were later articulated, in a political sense, in his landmark essay, "Civil Disobedience."

Busting the myths about Thoreau's 'Walden'

This resource from The Walden Woods Project dispels some of the common myths about Thoreau's time in the woods, including that he was a hermit (he actually regularly visited friends), that he was freeloading (he paid off his debts), that "Walden" was a misrepresentation (he was forthcoming about editing his experiences), and that he was opposed to progress (he believed in practical technology).

Mexico admired Lincoln for opposing the war and supporting Mexican sovereignty

As a congressman, Abraham Lincoln condemned the Mexican-American War as unjust. Years later, as president, he backed Mexico’s fight against French occupation. His principled stance earned enduring respect and monuments across Mexico.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

Twain's ‘To the Person Sitting in the Darkness’ satirized American imperialism

The 1901 essay was a response to the Philippine-American War as well as Rudyard Kipling’s poem, “The White Man’s Burden,” which argued that Western nations had a moral duty to rescue non-Western nations from ignorance. Twain’s essay ironically encouraged lecturing citizens of the countries being invaded: “for the sake of the Business we must persuade him to look at the Philippine matter in another and healthier way. We must arrange his opinions for him.”

Whitman's antislavery writing often focused on white Americans

The poet was openly opposed to slavery, though some of his writing focuses on abolition’s benefits for white people rather than for the lives of the enslaved.

Support for slavery helped drive Texas to revolt against Mexico

Mexico abolished slavery in 1829, but many Anglo-American settlers in Texas brought enslaved people and refused to comply. Their desire to preserve slavery was a major factor in Texas’s 1836 rebellion and independence from Mexico.

President Polk deliberately provoked war with Mexico

After Mexico refused to sell California and New Mexico, President James K. Polk ordered US troops into disputed territory between the Nueces River and the Rio Grande—knowing it would likely spark a conflict. When fighting broke out, he used it to justify declaring war.

Who said 'rebellion to tyrants is obedience to God'?

As a brief, punchy statement rejecting unjust authority, "Rebellion to tyrants is obedience to God" became widely adopted during the American Revolution. The phrase is often misattributed to Benjamin Franklin and Thomas Jefferson, the latter of whom used it on his personal seal. This fact-checked article dives into the history of the phrase, claiming it was first used in 1770 in an epitaph for an English judge. Read more here.

Shays' rebellion pitted rebel veterans against the Revolution's leaders

The Revolutionary War led to independence and significant debt for most states. In 1786, a group of veterans and farmers from western Massachusetts protested against the state government’s increased taxes. Led by Daniel Shays, the group attempted to capture an armory in Springfield but failed.

Marlon Brando used his 1973 Oscar win to protest the US government's treatment of Native Americans

Brando declined his best actor award at the Academy Awards, sending Chiricahua Apache activist Sacheen Littlefeather in his place to read a statement protesting Hollywood's depiction of Native people and the federal siege underway at Wounded Knee, South Dakota.

Washington condemned the Boston Tea Party

While he sympathized with the grievances behind it, he placed great importance on private property rights. He viewed the action as vandalism and believed those responsible should compensate the British East India Company.

Key was initially opposed to the War of 1812

Like the majority of Americans, Francis Scott Key was opposed to the US declaring war on Great Britain, calling the move “abominable.” His feelings began to change after the British raided Washington, D.C. He joined the Georgetown Artillery shortly after.

Hear how the world reacted to the American Civil War

European nations closely watched the Civil War for its economic and political consequences. Some European nations quietly engaged diplomatically with the Confederacy but withheld recognition. When the Union made slavery's abolition a central cause, European public opinion turned sharply against the South.

Watch Ken Burns' documentary series on the American Revolution

In "The American Revolution," filmmaker Ken Burns presents the conflict as both a global war and a civil war, telling its story through the lives of soldiers, civilians, enslaved people, Native nations, and international allies.

The nullification crisis tested whether states could defy federal law

In the 1830s, South Carolina declared federal tariffs void within its borders. President Andrew Jackson threatened military force, Congress passed a compromise tariff, and the episode ended with federal authority prevailing over state nullification.

Twain served in a Confederate militia for two weeks

In 1861, a 25-year-old Twain joined the Marion Rangers, a pro-Confederate militia. The group disbanded after two weeks upon hearing that Ulysses S. Grant, General of the Union Army, was headed their way. Twain moved to Nevada, where he eventually took a job at a newspaper.

Why Orwell fought in the Spanish civil war

Orwell wanted to volunteer for the International Brigades, a loose conglomerate of leftists fighting against Franco's Nationalists, in order to participate in what he saw as a struggle against fascism. The group rejected him, though Orwell still made his way to Barcelona to fight with a smaller sect, an experience that's laid out in this history from William Chislett.

A section condemning slavery was cut from the Declaration

Thomas Jefferson included a passage in his original draft denouncing slavery. This explainer from the Henry Ford Museum explores why Congress removed it to preserve colonial unity and how that decision shaped the nation's earliest political compromises.

Presidents from both parties have resisted the authority of the War Powers Act

Presidents from both parties have treated the War Powers Resolution as voluntary, framing compliance as seeking "support" rather than "permission." Courts have declined to rule on the law's constitutionality each time a related case was brought before them.

Death taxes have helped fund wars since the 1860s

Death taxes date back to 700 BCE and were used in Ancient Rome and Ancient Egypt. In the US, they've been used to finance wars since the Civil War, and have been levied on both the estate and beneficiary. The estate tax created during WWI to help finance war efforts is still in effect today.

The Third Amendment bars the forced housing of soldiers in private homes

The amendment was designed to address a specific grievance of the Colonies and remains the only Bill of Rights provision that has never been directly tested by a Supreme Court ruling on its merits.

Mark Twain spent decades feuding with the US Postal Service, convinced its costs and regulations were bureaucratic overreach.

The ACLU was founded in 1920 in direct response to the suppression of speech during World War I

The mass arrest and prosecution of anti-war activists, socialists, and immigrants under the Espionage and Sedition Acts prompted a group of civil libertarians to form the American Civil Liberties Union to defend constitutional rights.

Dr. Martin Luther King Jr. publicly denounced the Vietnam War in 1967

In a 1967 speech, Dr. King comprehensively condemned the US war in Vietnam, linking militarism, racism, and poverty—a break that cost him allies and drew backlash from political leaders and major media outlets.

Famed poet TS Eliot rejected the manuscript for George Orwell's political fable 'Animal Farm,' writing that its criticism of authoritarianism was not 'the right point of view.'

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

70 years ago today, city officials in Santa Cruz, California, banned rock 'n' roll to protect its youth from corruption after witnessing a 'provocative' concert the night before.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

In 2018, 26-year-old missionary John Allen Chau was killed by tribesmen after attempting to reach and evangelize on India's isolated North Sentinel Island

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

See a 3D reconstruction of Tenochtitlan, the Aztec capital that was home to an estimated population of 200,000 to 400,000.

Lesser-known phobias include turophobia, or the fear of cheese, and nomophobia, the fear of being without your cell phone.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Pure water does not conduct electricity because this flow of energy requires the movement of charged particles, and water is a neutral molecule.