The Soviet Union explained

Soviet control spread across Eastern Europe after WWII

In the late 1940s, the USSR solidified control over Eastern Europe by installing pro-communist regimes in countries like Poland, Hungary and Romania—often through rigged elections and political repression.

See a timeline of the major moments in Soviet history

Beginning with Lenin’s return to Russia from Germany in 1917 and ending with Gorbachev’s resignation on December 25, 1991, this timeline outlines the significant domestic and foreign policy developments that led to the rise and fall of the Soviet Union.

The Soviet Union consisted of 15 Soviet Socialist Republics

The USSR comprised 15 republics—Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan—all governed from Moscow, the Soviet capital and still Russia’s capital today.

Stalin transformed the USSR through rapid industrialization and brutal repression

Ruling from the mid-1920s to 1953, Joseph Stalin reshaped the Soviet Union with forced collectivization, crash industrial growth, and widespread terror. His policies modernized the economy but caused mass famine, purges, and the deaths of millions.

The Soviet Union had a similar sphere of influence policy during the Cold War—the Brezhnev Doctrine

Articulated in 1968, the Brezhnev Doctrine claimed the Soviet Union's right to intervene militarily in its satellite states to prevent any deviation from communist rule. It was used to justify the invasion of Czechoslovakia that same year and the invasion of Afghanistan in 1979.

Cold War summary on a map

The Cold War spanned much of the world, going far beyond the main territories of the principal players: the US and the Soviet Union. This video map shows where the action took place, from the wars in Southeast Asia to the Suez Canal in Egypt.

Gulags were a vast network of Soviet forced-labor camps under Stalin

The USSR’s gulag system imprisoned millions in harsh, often deadly conditions from the 1930s to the 1950s. This resource features an interactive map that shows the locations of individual camps and includes stories of those who were imprisoned.

The Soviet Union’s surprising first atomic test ended the US nuclear monopoly

In 1949, the USSR successfully tested its first atomic bomb—ending the US monopoly on nuclear weapons and sparking an arms race that would define the Cold War.

Explore 1,500 Soviet propaganda posters showcasing the USSR’s visual cultu

This extensive gallery curated by Ben Perry features nearly 1,500 Socialist Realist posters. The images celebrate agriculture, industry, and cultural life, condemn fascism and capitalism, and glorify leaders like Lenin and Stalin through bold colors, striking typography, and classic Soviet design.

Roosevelt formally recognized the Soviet Union in 1933

In 1933, President Franklin D. Roosevelt formally recognized the Soviet Union—ending 16 years of nonrecognition and aiming to improve trade and stabilize relations amid growing global instability.

Sartre eventually denounced communism

The French philosopher was a long-time ardent supporter of communism and the USSR. He finally spoke out against the movement with the 1956 Soviet invasion of Hungary, saying that the move was "made possible by 12 years of terror and imbecility."

Lenin’s “dictatorship of the proletariat” meant power held by workers, not elites

Lenin argued that capitalism concentrated power in a small ruling class, and only transferring authority to industrial workers could eliminate exploitation and class hierarchy. This five-minute explainer outlines how he envisioned that revolutionary shift.

The disaster affected the Soviet Union's credibility at home and abroad

The USSR's secretive, chaotic response to Chernobyl dealt a significant blow to its legitimacy. Public anger over deception, health risks, and propaganda fueled mass protests, strengthened independence movements in Ukraine and Belarus, and convinced many Soviets that the system was failing.

The Cuban Revolution explained

Between 1953 and 1959, Fidel Castro and Che Guevara led a small guerrilla movement that toppled Cuba’s Batista dictatorship and created the Western Hemisphere’s first socialist state—reshaping Cuban society and permanently transforming US–Cuba relations.

How landlocked Moscow became Europe's biggest city

It's far enough north to have avoided the nomadic hordes who, for centuries, raided the European plain to its south—but it's just south enough to still farm the land. What's more, Moscow is protected by the huge taiga forests and is guarded by rare east-west rivers in a continent with mostly north-south ones.

Soviet cosmonaut Yury Gagarin was the first human to journey into outer space

In 1961, aboard Vostok 1, the pilot orbited the Earth once for 108 minutes. On his return, he parachuted out of his capsule and landed in a field near present-day Space Conquerors Park, south of Moscow.

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.”

Communism grew in appeal during the Great Depression

With at least a quarter of the country out of work, some Americans disenchanted with capitalism began looking at alternatives. Watch this five-minute video to learn about communism's growing allure during the Great Depression.

What was life like in walled-off West Berlin?

As Germany fractured along ideological lines, ruled by the Soviet Union in the East and Allied powers in the West, the capital city of Berlin, fully immersed in Soviet territory, became an island of refuge for people trying to flee Communist...

Understanding the differences between capitalism and socialism

The two economic systems are rarely found in their pure form. Capitalism emphasizes private property, capital accumulation, and limited government regulation, while socialism favors government control of production to meet the needs of everyone rather than to generate profit. Most economies are a mix of both.

McDonald’s 1990 opening in Moscow symbolized the USSR’s fading isolation

When McDonald’s arrived in Moscow in 1990—an icon of Western capitalism—it became a cultural shock. NPR’s Invisibilia recounts how the chain asked new Russian employees to greet customers with American-style smiles, exploring the clash between Soviet norms and Western service culture (segment starts around 42 minutes in).

Before Biosphere 2, the Soviet BIOS-3 system tested semi-closed ecosystems

Built from 1965 to 1972, the habitat hosted 10 experiments with crews ranging from one to three individuals who had their air recycled by algae and grew their own wheat and vegetables. However, dried meats were routinely brought into the facility to balance crew members’ diets.

Who owns outer space?

More and more material ends up in Earth's orbit, posing threats to orbiting space stations and satellites. A 1960s treaty technically made space the common property of humankind, but with increasing chances of conflict in space, things can seem anarchic. This video breaks down the brewing tensions in space.

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

Read Orwell's original preface to 'Animal Farm,' criticizing the publishers who had rejected the book

Orwell's opening remarks for the 1945 publication chastised the publishers who'd rejected the manuscript, even quoting one of them directly who said they weren't interested in offending the Soviet Union, a British ally. The essay was not included with the book, though it appeared several decades later, after Orwell's death, in the Times Literary Supplement.

Ranking the world’s economies: 1980 vs. 2025

The US remains the world’s largest economy, having increased its annual gross domestic product from $2.9T in 1980 to $30.6T in 2025. In 1980, China ranked seventh globally with a GDP of $304B. In 2025, China ranked second with a GDP of $19.4T.

Before humans, the Soviet Union and the United States sent animals—including apes, dogs, and cats—to space during the Space Race.

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.

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.'

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 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.

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

In 2026, Finland was named the world's happiest country for the ninth consecutive year based on its wealth, social safety network, and high life expectancy, among other factors.

See the most iconic photos from four decades of LIFE magazine

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

While the sun's gravity keeps the planets in orbit, their gravity also pulls on the sun, causing it and everything else in the solar system to orbit around a mutual balance point called the barycenter—the true center of the solar system.

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

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

The syncytiotrophoblast is the outer layer of the placenta and the largest human cell, spanning an area about twice that of a king-sized bedsheet.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

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

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

The distributor behind 'Rocky Horror' pulled the film from its scheduled national release, believing it would be a failure, though it eventually amassed a dedicated fanbase through midnight showings, a trend that continues over 50 years later.

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

After her fellow cult members tried to kill her with an LSD-infused hamburger, one member of the Manson Family, the murderous cult led by Charles Manson, decided to testify against the group's leader.

Scientists testing how climate change affects plants found, in a years-long simulation study, that poison ivy grew 70% faster with the resulting extra carbon dioxide.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by over 1.5 million Muslims.