David Logan talks about the five kinds of tribes that humans naturally form -- in schools, workplaces, even the driver's license bureau. By understanding our shared tribal tendencies, we can help lead each other to become better...

In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young...

Learn about the life of Bayard Rustin, a leader in the Civil Rights Movement, a gay rights activist, and one of Martin Luther King’s closest advisors. -- In 1963, Martin Luther King Jr. delivered his “I Have a Dream” speech at the March...

Ocean explorer Robert Ballard takes us on a mindbending trip to hidden worlds underwater, where he and other researchers are finding unexpected life, resources, even new mountains. He makes a case for serious exploration and mapping....

In 1848, Europe experienced a wave of revolutions. Last week we covered some of the reform movements that presaged these uprisings. This week, we're learning about what the people wanted from the revolutions, who was involved, and how...

You’ve probably heard that the supervolcano under Yellowstone National Park is a ticking time bomb ready to go off at any time. But as it turns out, volcanologists aren't too worried about it.

How do you talk to someone who doesn't believe in climate change? Not by rehashing the same data and facts we've been discussing for years, says climate scientist Katharine Hayhoe. In this inspiring, pragmatic talk, Hayhoe shows how the...

Many people in the United States and Latin America have grown up celebrating the anniversary of Christopher Columbus's voyage. But was he an intrepid explorer who brought two worlds together or a ruthless exploiter who brought...

In which John Green teaches you about the early days of the Civil Rights movement. By way of providing context for this, John also talks a bit about wider America in the 1950s. The 1950s are a deeply nostalgic period for many Americans,...

In which John Green teaches you about World War II, a subject so big, it takes up two episodes. This week, John will teach you how the United States got into the war, and just how involved America was before Congress actually declared...

Sometimes, a single decision can change the course of history. Join journalist and author Isabel Wilkerson as she tells the story of the Great Migration, the outpouring of six million African Americans from the Jim Crow South to cities...

European powers had a lot of wars in the 18th century, and they weren't confined to Europe. Conflict raged across the globe, in what might be called a World War...but we don't call it that, because we already have a couple of those...

When you think of North American cuisine, do Indigenous foods come to mind? Chef Sean Sherman serves up an essential history lesson that explains the absence of Native American culinary traditions across the continent, highlighting why...

In which John Green teaches you about the Progressive Era in the United States. In the late 19th and early 20th century in America, there was a sense that things could be improved upon. A sense that reforms should be enacted. A sense...

Straddling Virginia and North Carolina is an area that was once described as the "most repulsive of American possessions." By 1728, it was known as the Great Dismal Swamp. But while many deemed it uninhabitable, recent findings suggest...

In which John Green teaches you about American involvement in World War I, which at the time was called the Great War. They didn't know there was going to be a second one, though they probably should have guessed, 'cause this one didn't...

Jay Walker explains why two billion people around the world are trying to learn English. He shares photos and spine-tingling audio of Chinese students rehearsing English -- "the world's second language" -- by the thousands.

The American Civil War is one of the deadliest in US History, and let's just get this out of the way: it was about slavery. In the more than 150 years since the end of the Civil War, there have been many attempts to litigate the reasons...

This week on Crash Course Economics, we're talking about monetary policy. The reality of the world is that the United States (and most of the world's economies) are, to varying degrees, Keynesian. When things go wrong, economically, the...

Today, Craig is going to give you an overview of civil rights and civil liberties. Often these terms are used interchangeably, but they are actually very different. Our civil liberties, contained in the Bill of Rights, once only...

In which John Green ACTUALLY teaches about the Civil War. In part one of our two part look at the US Civil War, John looks into the causes of the war, and the motivations of the individuals who went to war. The overarching causes and the...

In which John Green teaches you about World War II, aka The Great Patriotic War, aka The Big One. So how did this war happen? And what does it mean? We've all learned the facts about World War II many times over, thanks to repeated...

Social media has become our new home. Can we build it better? Taking design cues from urban planners and social scientists, technologist Eli Pariser shows how the problems we're encountering on digital platforms aren't all that new --...

Cities pump out 70 percent of all global carbon emissions -- which means they also have the greatest opportunity to lower CO2 levels and energy consumption. Climate and data scientist Angel Hsu shares how cities around the world are...