Josette Sheeran, the head of the UN's World Food Program, talks about why, in a world with enough food for everyone, people still go hungry, still die of starvation, still use food as a weapon of war. Her vision: "Food is one issue that...

When war between Israel and Iran seemed imminent, Israeli graphic designer Ronny Edry shared a poster on Facebook of himself and his daughter with a bold message: "Iranians ... we [heart] you." Other Israelis quickly created their own...

One of a dozen Pakistanis who came to TEDIndia despite security hassles entering the country, TED Fellow Asher Hasan shows photos of ordinary Pakistanis that drive home a profound message for citizens of all nations: look beyond...

Four-star general Stanley McChrystal shares what he learned about leadership over his decades in the military. How can you build a sense of shared purpose among people of many ages and skill sets? By listening and learning -- and...

What's it like to grow up within a group of people who exult in demonizing ... everyone else? Megan Phelps-Roper shares details of life inside America's most controversial church and describes how conversations on Twitter were key to her...

Civilians don't miss war. But soldiers often do. Journalist Sebastian Junger shares his experience embedded with American soldiers at Restrepo, an outpost in Afghanistan's Korengal Valley that saw heavy combat. Giving a look at the...

Wes Moore joined the US Army to pay for college, but the experience became core to who he is. In this heartfelt talk, the paratrooper and captain -- who went on to write "The Other Wes Moore" -- explains the shock of returning home from...

Gráinne, princess of Tara and bride-to-be, was furious. She had thought she was betrothed to a young soldier, bold and brilliant enough to be her equal. Yet it soon became clear she was expected to marry Fionn, a warrior far past his...

In which John Green investigates war, and what exactly it may or may not be good for. Was war a result of human beings organizing into larger and more complex agricultural social orders, or did war maybe create agriculture and...

Guitarist and singer Raul Midon plays "Everybody" and "Peace on Earth" during his 2007 set at TED.

Get ready for hilarity, because this week, we're diving head first into Greek Comedy. Actually, though, maybe don't get TOO ready for hilarity. Taste in humor has changed a little over the last couple of thousand years. You already know...

Meditation asks you to slip into a state of serene presence. But why does something that sounds effortless often feel so difficult? In this lighthearted invitation, spiritual leader Yongey Mingyur Rinpoche shares three steps to help you...

Climate change is unfair. While rich countries can fight against rising oceans and dying farm fields, poor people around the world are already having their lives upended -- and their human rights threatened -- by killer storms,...

World War I was a total war for millions of people in Europe. Many men were enlisted in the fighting, but the war work had implications for the daily lives of a huge number of Europeans. Women entered the workforce in huge numbers, and...

Nobel Peace laureate Jody Williams brings tough love to the dream of world peace, with her razor-sharp take on what "peace" really means, and a set of profound stories that zero in on the creative struggle -- and sacrifice -- of those...

Today nine nations collectively control more than 15,000 nuclear weapons, each hundreds of times more powerful than those dropped on Hiroshima and Nagasaki. We don't need more nuclear weapons; we need a new generation to face the...

Historian and diplomat Joseph Nye gives us the 30,000-foot view of the shifts in power between China and the US, and the global implications as economic, political and "soft" power shifts and moves around the globe.

After fleeing war-torn South Sudan as a child, Mary Maker found security and hope in the school at Kenya's Kakuma Refugee Camp. Now a teacher of young refugees herself, she sees education as an essential tool for rebuilding lives -- and...

Imagine global security driven by collaboration -- among agencies, government, the private sector and the public. That's not just the distant hope of open-source fans, it's the vision of James Stavridis, a US Navy Admiral. Stavridis...

The Russian invasion of Ukraine has destroyed so much -- including hundreds of schools, where the country's children were forging their futures -- but it has not stopped Ukrainians from pursuing knowledge and curiosity. In a deeply...

Africa's youth is coming of age rapidly, but job growth on the continent isn't keeping up. The result: financial insecurity and, in some cases, a turn towards insurgent groups. In a passionate talk, agricultural entrepreneur Kola Masha...

When Lesley Hazleton was writing a biography of Muhammad, she was struck by something: The night he received the revelation of the Koran, according to early accounts, his first reaction was doubt, awe, even fear. And yet this experience...

Some works of art can be worth thousands, even millions, of dollars. But what if you aren't so sure that Van Gogh you just bought to hang over your toilet is the real deal? Luckily, we can use science to sniff out fakes!

Among the top prestigious awards in the world, the Nobel Peace Prize has honored some of the most celebrated and revered international figures and organizations in history. But how does the nomination process work? And who exactly is...