Judge Victoria Pratt is inspiring a global revolution in criminal justice.

Sue Desmond-Hellmann leads the Bill & Melinda Gates Foundation’s mission to establish equity for every person.

Journalist and commentator John Hockenberry has reported from all over the world in virtually every medium. He's the author of "Moving Violations: War Zones, Wheelchairs and Declarations of Independence."

TED Senior Fellow Paul Rucker explores issues related to mass incarceration, racially motivated violence and the continued impact of policies that sustain inequity.

Pat Mitchell is a lifelong advocate for women and girls.

Morgan Spurlock makes documentary film and TV that is personal, political -- and, above all, deeply empathetic.

Broadway and TV veteran Sara Ramirez challenges stereotypes even as she beguiles audiences.

Sangu Delle is an entrepreneur and clean water activist. A TED Fellow who hails from Ghana, he sees incredible potential in the African economy.

Artist + cultural activist

Ole Scheeren designs buildings that generate both functional and social spaces.

Zubaida Bai innovates health and livelihood solutions for underserved women and girls around the world.

Long revered in the UK for her wit and candor, Sandi Toksvig is now lending her familiar voice to a greater cause -- equality for women.

By blending up to 100 still photographs into a seamless composite that captures the transition from day to night, Stephen Wilkes reveals the stories hidden in familiar locations.

Forensic biologist

Photojournalist

By taking the phrase "Black Lives Matter" onto social media, Opal Tometi helped turn a hashtag into a networked movement.

Poet + recording artist

Nina Fedoroff writes and lectures about the history and science of genetically modified organisms.

Documentary Photographer

Sitar player + filmmaker

Culture Curator

Art activist

Culture curator

Pan African educator

Inventor + environmentalist

Astrophysicist + science educator

3D visualization researcher

Organic industry entrepreneur

Citizen journalist

Web entrepreneur