How do parents protect their children and help them feel secure again when their homes are ripped apart by war? In this warm-hearted talk, psychologist Aala el-Khani shares her work supporting -- and learning from -- refugee families...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. The world is becoming increasingly open, and that has implications both bright and dangerous. Marc Goodman paints a...

Exposing what life looks like in Afghanistan after a 20-year US occupation and the Taliban's stunning and rapid takeover, TED Fellow and documentary photographer Kiana Hayeri captures harrowing glimpses and multifaceted realities of a...

Why do some people do selfless things, helping other people even at risk to their own well-being? Psychology researcher Abigail Marsh studies the motivations of people who do extremely altruistic acts, like donating a kidney to a...

Growing up in a violent household creates the risk of perpetuating that violence later in life, but is it avoidable?

On February 10, 2015, Suzanne Barakat's brother Deah, her sister-in-law Yusor and Yusor's sister Razan were murdered by their neighbor in Chapel Hill, North Carolina. The perpetrator's story, that he killed them over a traffic dispute,...

This animation is part of the TED-Ed series, "There's a Poem for That," which features animated interpretations of poems both old and new that give language to some of life's biggest feelings. [Poem by Brendan Constantine, directed by...

Peter van Uhm is the Netherlands' chief of defense, but that does not mean he is pro-war. In this talk, he explains how his career is one shaped by a love of peace, not a desire for bloodshed -- and why we need armies if we want peace.

Peaceful protests can help people have their voices heard, but sometimes a protest becomes a more aggressive riot. How does that happen?

Now more than ever, it's important to look boldly at the reality of race and gender bias -- and understand how the two can combine to create even more harm. Kimberle Crenshaw uses the term "intersectionality" to describe this phenomenon;...

Psychopathic killers are the basis for some must-watch TV, but what really makes them tick? Neuroscientist Jim Fallon talks about brain scans and genetic analysis that may uncover the rotten wiring in the nature (and nurture) of...

For a long time, I lived for death, says Manwar Ali, a former radical jihadist who participated in violent, armed campaigns in the Middle east and Asia in the 1980s. In this moving talk, he reflects on his experience with radicalization...

There's a play so powerful that an old superstition says its name should never be uttered in a theater. A play that begins with witchcraft and ends with a bloody, severed head. A play filled with riddles, prophecies, nightmare visions,...

It is time for a gender reckoning, beginning with men authentically confronting our internal selves and each other, says essayist and intersectional justice advocate Jimmie Briggs. In this call to action for gender equity, he unpacks how...

In which John Green teaches you about the post-World War II breakup of most of the European empires. As you'll remember from previous installments of Crash Course, Europeans spent several centuries sailing around the world creating...

The president of the United States of America is often said to be one of the most powerful positions in the world. But of all the US presidents accused of abusing that power, only one has left office as a result. Does Richard Nixon...

Could smartphones and cameras be our most powerful weapons for social justice? Through her organization Witness, Yvette Alberdingk Thijm is developing strategies and technologies to help activists use video to protect and defend human...

Leslie Morgan Steiner was in "crazy love" -- that is, madly in love with a man who routinely abused her and threatened her life. Steiner tells the story of her relationship, correcting misconceptions many people hold about victims of...

How do we make sense of today's political divisions? In a wide-ranging conversation full of insight, historian Yuval Harari places our current turmoil in a broader context, against the ongoing disruption of our technology, climate, media...

Formally or informally, human societies across place and time have made rules to bind and dissolve couples. The stakes of who can obtain a divorce, and why, have always been high. Divorce is a battlefield for some of society's most...

Sometimes culture can seem invisible like when we're surrounded by signals that tell us we're with others who are like us, but if we live or travel somewhere where the traits that define social norms are not our traits, culture can...

After World War II, Europe was changing radically, and its place in the world was changing as well. European powers had colonized around the world in the 18th and 19th centuries, and in the 20th century, it all came crashing down. Of...

In which John asks whether globalization is a net positive for humanity. While the new global economy has created a lot of wealth, and lifted a lot of people out of poverty, it also has some effects that aren't so hot. Wealth disparity,...

Terrorists and extremists aren't all naturally violent sociopaths -- they're deliberately recruited and radicalized in a process that doesn't fit into a neat pattern. erin Marie Saltman discusses the push and pull factors that cause...