John Hunter puts all the problems of the world on a 4'x5' plywood board -- and lets his 4th-graders solve them. At TED2011, he explains how his World Peace Game engages schoolkids, and why the complex lessons it teaches -- spontaneous, and always surprising -- go further than classroom lectures can.

When film critic Roger Ebert lost his lower jaw to cancer, he lost the ability to eat and speak. But he did not lose his voice. In a moving talk from TED2011, Ebert and his wife, Chaz, with friends Dean Ornish and John Hunter, come together to tell his remarkable story.

We can't control if we'll die, but we can "occupy death," in the words of Peter Saul, an emergency doctor. He asks us to think about the end of our lives -- and to question the modern model of slow, intubated death in hospital. Two big questions can help you start this tough conversation.

Journalist Anas Aremeyaw Anas has broken dozens of stories of corruption and organized crime all over Ghana -- without ever revealing his identity. In this talk (in which his face remains hidden) Anas shows grisly footage from some of his investigations and demonstrates the importance of facing injustice.

If we hope to heal the racial tensions that threaten to tear the fabric of society apart, we're going to need the skills to openly express ourselves in racially stressful situations. Through racial literacy -- the ability to read, recast and resolve these situations -- psychologist Howard C. Stevenson helps children and parents reduce and manage...

Say hello to the decentralized economy -- the blockchain is about to change everything. In this lucid explainer of the complex (and confusing) technology, Bettina Warburg describes how the blockchain will eliminate the need for centralized institutions like banks or governments to facilitate trade, evolving age-old models of commerce and finance...

We all have thoughts in our heads. Our self-image, our perception of ourselves, is shaped by these thoughts. In this TEDx Talk, Jean Hendry asks you to consider changing your perspective and bring in a roommate to combat the monologue in your head. It is the very best thing you could ever do for yourself. Turn your self-doubt into recognizing a...

Hendrik-Jan Grievink is researcher and designer at Next Nature Network and in that position responsible for much of the visual output of the network. He co-edited and designed the award-winning In Vitro Meat Cookbook that explores the future of lab grown meat through 45 speculative recipes and invented the Pyramid of Technology, a conceptual mod...