'No army can withstand the strength of an idea whose time has come.'

'We are on the move now ... Like an idea whose time has come, not even the marching of mighty armies can halt us. We are moving to the land of freedom ...'

- Martin Luther King Jr. at the conclusion of the five-day, 54-mile march

'Keep working on a plan. Make no little plans. Make the biggest one you can think of, and spend the rest of your life carrying it out.'

- President Harry Truman (1884-1972)

A quote by Howard Hughes

"Do the impossible, because almost everyone has told me my ideas are merely fantasies."

'Hearts are the strongest when they beat in response to noble ideals.'

- American diplomat Ralph Bunche (1904–1971)

'All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost.'

- "The Lord of the Rings" author JRR Tolkien (1892-1973)

'If the time is not ripe, we have to ripen the time.'

- Activist Dorothy Height (1912-2010)

'Many of life's failures are people who did not realize how close they were to success when they gave up.'

- Inventor Thomas Edison (1847 - 1931)

'Organize, agitate, educate, must be our war cry.'

- Suffragist Susan B. Anthony (1820-1906)

'If you hear a voice within you say 'you cannot paint,' then by all means paint, and that voice will be silenced.'

- Vincent van Gogh (1853-1890)

'The man who can drive himself further once the effort gets painful is the man who will win.'

- Roger Bannister (1929-2018)

'I think a hero is an ordinary individual who finds the strength to persevere and endure in spite of overwhelming obstacles.'

- "Superman" actor Christopher Reeve (1952 - 2004)

A quote by Herman Melville

"Whoever is not in the possession of leisure can hardly be said to possess independence."

'A word after a word after a word is power.'

- Author Margaret Atwood (1939-present)

Before Dawkins, other biologists proposed the power of mutating ideas

Nobel Prize winner Jacques Monod proposed, “Ideas have retained some of the properties of organisms. Like them, they tend to perpetuate their structure and to breed; they too can fuse, recombine, segregate their content; indeed they too can evolve, and in this evolution selection must surely play an important role.”

Writer Christopher Hitchens on why Orwell matters

In this 2008 segment with NPR, the author of "Why Orwell Matters" discusses his admiration for the author and fields questions from callers. Hitchens notes that anyone can write about tyranny, but that Orwell's brilliance is in exploring why people "are so keen to obey."

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.

'Keep Calm and Carry On' was long-forgotten World War II propaganda

The British Ministry of Information developed the stoic phrase ahead of German attacks at the start of World War II in 1939. It was never officially released on posters and then lay dormant until 2000, when one of the remaining posters was discovered at a bookstore in the UK. It has since been adapted into countless memes.

Delacroix's 'Liberty Leading the People' depicts a scene from the French Revolution

The massive painting, at over 8 feet by 10 feet, is striking, especially considering the warfare being depicted. Paintings of this size were usually reserved for historical events, but Delacroix was portraying what the people of Paris experienced just a few months earlier.

Washington's military acumen and political judgment were crucial to the Continental Army's success

In this podcast, Pulitzer Prize-winning historian Rick Atkinson argues that Washington's endurance, strategic communication, political judgment, and ability to elevate capable subordinates proved decisive, in sharp contrast to the failures of British leadership during the war.

'I ought to be jealous of the tower. She is more famous than I am.'

- Gustave Eiffel (1832–1923)

Camus won the Nobel Prize in literature in 1957 for his philosophical essays and fiction

The philosopher and novelist was one of the youngest writers to win the award, at just 44. In his acceptance speech, he spoke on the role of an artist in a world that seemed increasingly bleak. "Each generation doubtless feels called upon to reform the world," he said. "Mine knows that it will not reform it, but its task is perhaps even greater. It consists in preventing the world from destroying itself."

The word 'dystopia' was first used in 1868

John Stuart Mill, an English philosopher, economist, and politician, uttered the word at the House of Commons while criticizing what he considered to be the government’s insufficient land policy for the Irish, saying, “What is commonly called Utopian is something too good to be practicable; but what they appear to favour is too bad to be practicable.”

Justice Oliver Wendell Holmes championed the idea of speech as a 'marketplace of ideas'

In his landmark dissent in Abrams v. United States, Justice Holmes argued that the best way to combat harmful ideas is through open competition—a principle that became foundational to modern First Amendment law.

A bankrupt flour merchant in debtor’s prison helped inspire the Erie Canal

In 1807, Jesse Hawley, jailed for debt after struggling with high transport costs, published essays under the pen name “Hercules.” His writings laid out the canal’s route and benefits, galvanizing support for the project.

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 standing ovation comes from an ancient Roman military tradition

Ovation is derived from the Latin for “I rejoice” and was a ceremonial salute to military generals who'd been victorious in battle.

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

The power and influence of the American presidency have expanded significantly over time—far beyond what the founders envisioned.

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.

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

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.

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

Existentialist writer Jean-Paul Sartre coined the famous phrase 'Hell is—other people' in his play 'No Exit'

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

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

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

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 NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

Meet the 56 signers of the Declaration of Independence—most of whom didn't put pen to paper until August 2, 1776—and see their original signatures.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

Explore a list of the 100 best novels of all time, compiled by some of the world's best living writers, including Salman Rushdie, Stephen King, and Jennifer Egan.

In 1945, Surrealist artist Salvador Dalí and legendary animator Walt Disney began collaborating on a short film that was not completed until 2003, years after both men had died.

Graffiti dates back to at least ancient Pompeii, where citizens scrawled messages to one another on public walls

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

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

Fireworks make a loud booming sound after exploding due to air expanding faster than the speed of sound.

Watch this video that uses Lego bricks to explain how venture capital works.

Larger animals like giraffes, elephants, and blue whales have developed a unique defense against cancer, a phenomenon known as Peto's Paradox

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in terms of casualties, forces mobilized, and displacement of civilians.