Author Robert Wright explains "non-zero-sumness" -- the network of linked fortunes and cooperation that has guided our evolution to this point -- and how we can use it to help save humanity today.

Robert Wright uses evolutionary biology and game theory to explain why we appreciate the Golden Rule ("Do unto others..."), why we sometimes ignore it and why there’s hope that, in the near future, we might all have the compassion to follow it.

What does it take to build a national movement? In a captivating conversation with TEDWomen curator Pat Mitchell, Marian Wright Edelman reflects on her path to founding the Children's Defense Fund in 1973 -- from the early influence of growing up in the segregated American South to her activism with Dr. Martin Luther King Jr. -- and shares how g...

The US economy has been expanding wildly for two centuries. Are we witnessing the end of growth? Economist Robert Gordon lays out 4 reasons US growth may be slowing, detailing factors like epidemic debt and growing inequality, which could move the US into a period of stasis we can't innovate our way out of. Be sure to watch the opposing viewpoin...

Steven Pinker charts the decline of violence from Biblical times to the present, and argues that, though it may seem illogical and even obscene, given Iraq and Darfur, we are living in the most peaceful time in our species' existence.

Satirist Tom Rielly delivers a wicked parody of the 2006 TED conference, taking down the $100 laptop, the plight of the polar bear, and people who mention, one too many times, that they work at Harvard. Watch for a special moment between Tom and Al Gore.

Fumes from indoor cooking fires kill more than 2 million children a year in the developing world. MIT engineer Amy Smith details an exciting but simple solution: a tool for turning farm waste into clean-burning charcoal.

What if your hour-long commute was reduced to just minutes? That's the promise of the hyperloop: a transit system designed around a pod that zooms through a vacuum-sealed space (roughly the size of a subway tunnel) at hyper-speed, powered by next-generation batteries and state-of-the-art magnetic levitation. In the visionary talk, Josh Giegel, t...

Jehane Noujaim unveils her 2006 TED Prize wish: to bring the world together for one day a year through the power of film.