Building a health-care movement, Physician-Anthropologist Paul Farmer has dedicated his life to treating some of the world's poorest populations, in the process helping to raise the standard of health care for the destitute sick everywhere.

Building a health-care movement, Physician-Anthropologist Paul Farmer has dedicated his life to treating some of the world's poorest populations, in the process helping to raise the standard of health care for the destitute sick everywhere.

Cheryl L. Dorsey, former medical doctor turned social entrepreneur, believes in the transformative power of a generation of young people dedicating themselves to be a force for good. As the leader of Echoing Green, she is in the business of identifying, investing in, and developing outstanding emerging social entrepreneurial talent throughout the world.

Cheryl L. Dorsey, former medical doctor turned social entrepreneur, believes in the transformative power of a generation of young people dedicating themselves to be a force for good. As the leader of Echoing Green, she is in the business of identifying, investing in, and developing outstanding emerging social entrepreneurial talent throughout the world.

Peter Thum left the corporate world with a vision to tackle the World Water Crisis. He founded Ethos Water, helping hundreds of thousands of people in Africa, Asia and Latin America gain access to clean water and has engaged millions of American consumers to make it happen.

Peter Thum left the corporate world with a vision to tackle the World Water Crisis. He founded Ethos Water, helping hundreds of thousands of people in Africa, Asia and Latin America gain access to clean water and has engaged millions of American consumers to make it happen.

Chuck D is the founder of Public Enemy, one of the most important and pioneering groups in hip-hop history. By leveraging the cultural movement he helped to establish, he has impacted the youth vote in large scale and sustainable ways and redefined the role of artist as social, political and cultural activist.

Chuck D is the founder of Public Enemy, one of the most important and pioneering groups in hip-hop history. By leveraging the cultural movement he helped to establish, he has impacted the youth vote in large scale and sustainable ways and redefined the role of artist as social, political and cultural activist.

Craig Newmark, using a customer service approach, has leveraged the internet to revolutionize how people and organizations connect.

Grocer-philosopher John Mackey wanted to change the way the country eats when he co-founded Whole Foods Market in 1980; with his philosophy of Conscious Capitalism, he proposes to change the way we do business around the world.