The Audacious Project is a collaborative experiment to put bold ideas for social change into action.

Data visionary Hans Rosling's favorite talks keep an eye toward health, economics and population growth -- from business in Africa to youth culture in China.

Clear, compelling talks on big issues facing the global economy.

Dr. Paula Johnson is a pioneer in looking at health from a woman's perspective.

The global drug trade is complex. These talks offer nuanced reframes on an issue which is so often thought about in absolutes.

These talks will shake you awake to the world around you.

Groomed for terror, Zak Ebrahim chose a different life. The author of The Terrorist's Son, he hopes his story will inspire others to reject a path of violence.

David Cameron is the prime minister of the UK and the leader of the UK's Conservative Party.

Demystify criminal networks by learning how they build roots in society and weave themselves into the shadows of everyday life.

Sometimes it’s easy to think the worst of human beings. But these inspiring talks can help you remember: altruism, kindness and helping hands are all around.

Everyone makes snap judgments. These talks challenge the hidden biases we all hold -- around looks, race, class, gender, language.

At the Center for Disease Dynamics, Economics & Policy, economist Ramanan Laxminarayan looks at big-picture issues of global health.

In too many countries, it's still normal to torture prisoners for confessions and information. Karen Tse works to end that.

TED Explains the World with Ian Bremmer dives into complex geopolitical issues to explore what really matters in the critical news stories of the day. This special series — a partnership with political scientist Ian Bremmer, president and founder of Eurasia Group and GZERO Media — takes us behind the scenes of global affairs to offer a more comp...

The headlines on the front page always change. But these talks — on the seismic phenomenon underlying them — will give you fresh insight.

Big-picture talks about global politics and the shifting weight of the world.

Ilona Szabó de Carvalho designs solutions for some of the world's biggest challenges -- from reducing violence and reforming drug laws to renewing democracy and fighting polarization.

Thulasiraj Ravilla is the executive director of the Lions Aravind Institute of Community Ophthalmology, helping eye-care hospitals around the world build capacity to prevent blindness.

As a director of the World Bank in Nairobi, Peter Eigen saw firsthand how devastating corruption can be. He's founder of Transparency International, an NGO that works to persuade international companies not to bribe.

Dave Meslin is a "professional rabble-rouser." Based in Toronto, he works to make local issues engaging and even fun to get involved in.

A former two-term governor of Michigan, Jennifer M. Granholm makes the case for empowering states to create jobs through a Clean Energy Jobs Race to the Top.

Annette Heuser proposes critical reforms to loosen the iron grip of rating agencies on national credit scores.

TED Fellow Joy Sun helped to launch a rare type of charity. GiveDirectly lets donors transfer money directly into the hands of impoverished people — empowering them to set their own goals and priorities.

Fredy Peccerelli works with families whose loved ones “disappeared” in the 36-year armed conflict in Guatemala. The executive director of the Guatemalan Forensic Anthropology Foundation, he helps locate bodies and give back identities to those buried in mass graves.

Memory Banda is a tireless leader for girls’ rights, in Malawi and around the world.

Devdutt Pattanaik looks at business and modern life through the lens of mythology.

The former assistant secretary of defense and former dean of Harvard's Kennedy School of Government, Joseph Nye offers sharp insights into the way nations take and cede power.

For over 15 years Diana has been a secondary social studies teacher in Wisconsin, Kansas, Arizona and Pennsylvania.

Ola Rosling is the director and co-founder of the Gapminder Foundation. Previously, he was the Google Public Data product manager.

American lawyer Kimberley Motley is the only Western litigator in Afghanistan's courts; as her practice expands to other countries, she thinks deeply about how to build the capacity of rule of law globally.