How the British Empire transformed into today’s voluntary Commonwealth of Nations

A small island nation built the largest empire in history

See how Britain grew from a small kingdom into a global empire ruling nearly a third of the world, then unraveled through war, nationalist movements, and declining power—leaving just 14 overseas territories as remnants of its once-vast domain.

The British Empire, explained

This three-minute 1440 explainer traces the rise of the British Empire, which at its height ruled nearly one in four people—about 500 million—and spanned so many regions that admirers called it “the empire on which the sun never sets.”

The history of the British Empire—all in a single take

This video delivers a rapid, rhyming walk-through of the British Empire—filmed in one continuous shot aboard a sailing ship and featuring costumed actors portraying figures from Sir Francis Drake to Pocahontas.

Hong Kong: British colony turned Chinese police state

This 15-minute video explores how Hong Kong has changed since China reclaimed the territory from Britain in 1997. Hong Kong became a British colony after the First Opium War, a conflict arising from Britain's attempt to equalize trade with China through smuggled opium. Democratic rights assumed by Hong Kong residents, such as the right to protest, have been in peril since the 1997 shift, according to this video.

British colonialism left economic institutions that still shape growth today

This analysis argues that while the British Empire inflicted exploitation and long-term harm, it also exported institutions—like standardized property rights and land surveying—that boosted economic development in some colonies.

Some colonies were centuries-old before they broke from Britain

The revolution did not happen overnight, but was a culmination of centuries of settlement, policies, and war in North America. This timeline provides key, fascinating events from the 1600s through the Revolution in a smooth, easy-to-read interface.

The Declaration of Independence became a global blueprint for freedom

This documentary traces how the Declaration's language of liberty resonated through more than 100 independence movements worldwide, demonstrating how a single revolutionary text helped redefine notions of self-rule, rights, and legitimacy across centuries.

An alternate-history BBC homepage imagines a world where the British Empire endured

An image on Reddit envisions a 2021 BBC homepage from an uncollapsed Empire, featuring hypothetical crises in Zimbabwe, Northern Ireland, and Barbados, alongside upbeat coverage of tourism in “British Palestine”—a snapshot of how imperial news might look today.

Britain's PM signaled the acceptance of African decolonization in 1960

This audio excerpt captures Harold Macmillan’s 1960 “Wind of Change” speech, in which he acknowledged rising African nationalism and declared that Britain would not resist decolonization—a pivotal moment signaling the Empire’s accelerating retreat from the continent.

Colonial self-rule fostered strong autonomy and distrust of centralized power

American colonies were governed through a patchwork of different systems, ranging from Crown-run to locally controlled. Broad local autonomy—often followed by sudden imperial crackdowns—taught colonial leaders to prize home rule and distrust distant centralized power, attitudes that later informed US federalism.

Why the British royal family changed its name

Before 1917, British royals didn’t have last names—only dynastic titles. But during World War I, anti-German sentiment led King George V to replace “Saxe-Coburg-Gotha” with “Windsor.” In 1960, Queen Elizabeth II added “Mountbatten” for some descendants, but the rule isn’t binding—future monarchs can change it.

European powers carved up nearly all of Africa in just 4 decades

This video explains the "Scramble for Africa," when seven European nations seized over 90% of the continent between 1870 and 1910. Only Liberia and Ethiopia remained sovereign as imperial competition redrew Africa’s borders and reshaped its future.

The medieval origins of Māori and Moriori culture

New Zealand, also known as Aotearoa, was one of the last large land masses inhabited by humans. This 18-minute video explores the ancient origins of Polynesian people and their medieval journey to New Zealand and the nearby Chatham Islands archipelago.

Explore the countries with a federal system—and see how they work

This resource from the Forum of Federations catalogs the world's federal countries. It provides background information on each, including the emergence of federalism, the division of power, and the practical interaction between national and regional governments.

How NATO works

NATO now includes 32 member nations—but how does the alliance actually function? This explainer breaks down its structure, decision-making process, and funding model. From its founding in 1949 to its collective response after 9/11, here’s how NATO operates on a global scale.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

The colonial origins of Haiti/Dominican Republic divide

This 16-minute video explores the colonial origins of the modern-day split between Haiti and the Dominican Republic. Haiti previously was the French-Caribbean colony of Saint-Domingue, which was torn off the Spanish colony of Santo Domingo in 1697....

The Bretton Woods conference in 1944 created the foundations of the modern global economy

In July 1944, 44 nations gathered in Bretton Woods, New Hampshire, to create a new postwar economic order. The conference led to the creation of the IMF and the International Bank for Reconstruction and Development—now known as the World Bank.

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

The Partitions of Poland led to the erasure of the Polish-Lithuanian Commonwealth

Political instability and foreign interference weakened the Commonwealth, which was eventually divided between Prussia, Austria, and Russia. Poland would not be re-established until after World War I and decades of imperial oppression.

Relationships between countries have become more peaceful since the rules-based order was established

Our World in Data monitors bilateral relationships on a spectrum from open rivalry to "positive peace"—deep cooperation and mutual protection. In 1945, no countries had highly cooperative security relationships. Today, nearly a fifth do.

See the list of monarchs who have addressed a joint session of the US Congress

Only 11 monarchs have ever addressed a joint meeting of Congress, beginning with Hawaii's King Kalakaua in 1874. King Charles III of the United Kingdom became the most recent in April 2026.

How the Guy Fawkes mask became iconic

The Guy Fawkes mask, popularized by the film "V for Vendetta," is now one of the most iconic visual symbols in recent history. Learn about the mask's origin and adoption by protest movements in this brief piece. The movie presents an anonymous,...

The science of symmetry | The Royal Society

Nature is full of symmetries, from spiral galaxies to florets of broccoli. So why do complex creatures break the pattern?This short video discusses why symmetry came to dominate life on Earth, and how many complex life forms, such as humans, transitioned from radial to lateral symmetry.

The NBA, explained

From humble beginnings in 1891, basketball transformed into the global juggernaut we know today. The NBA, established in 1949 and later revitalized by Commissioner David Stern in the 1980s, became a model for sports branding, player marketing, and international expansion.

The interoperable metaverse and what that means

This explainer video explores the challenges of achieving the interoperability needed to unify economies, avatars and systems across virtual worlds in the metaverse.

Hear an oral history of the Electoral College and why it still exists

This podcast episode traces how the Electoral College emerged from rushed compromises, slavery-era power politics, and party maneuvering—showing why the system looks the way it does today and why efforts to change it have repeatedly stalled.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

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

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

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

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

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.'

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

Learn how your body is, scientifically, like a firework with its own slow, controlled burn.

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

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

See the evolution of Ebola vaccine and treatment development.

An investigation suggests a Scottish island became awash in forever chemicals via seafoam and seaspray—raising questions about what that means for the safety of other coastal areas.

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Dozens of S&P 500 stocks, including Coca-Cola and Walmart—known as the dividend aristocrats—have increased dividends every year for 25 years

Use this tool to calculate the dollar value of your parental mental load, from meal planning to coordinating after-school care, then see resources that help generate solutions.

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.

Some researchers have labeled nomophobia, the fear of being without your phone, as 'the phobia of the 21st century.'

While El Niño moves warm Pacific Ocean waters east along the equator, La Niña moves them west, shifting where rainfall will become more common for months.