Shannon Miller

Olympic Gold Medalist, Health Advocate & Cancer Survivor

Jenn Lim

CEO & Chief Happiness Officer at Delivering Happiness

Global Happiness and Well-Being Policy Report

Heidi Floyd

Thought Leader & Speaker on Breast Cancer; Breast Cancer Survivor

Heidi Floyd's Powerful Message

Van Jones

CNN Political Contributor; Author; Human Rights, Education & Clean Energy Advocate

Avi Rubin

Professor of Computer Science & Technical Director of the Information Security Institute at Johns Hopkins University

Jan Schlichtmann

Environmental Lawyer & Author, Subject of the Film "A Civil Action"

Carl Pope

Senior Adviser to UN Envoy for Cities and Climate; Former CEO and Chairman of the Sierra Club

Sylvia Earle

National Geographic Society Explorer-in-Residence & Oceanographer

John Mackey

Co-Founder & CEO, Whole Foods Market

Adrian Gostick

Founder of The Culture Works & Bestselling Author of "The Best Team Wins"

Fiona Harvey

Environmental Correspondent, The Guardian.

Sir Richard Branson

Businessman, Founder of Virgin Group

Rasmus Hougaard

Founder & Managing Director of The Potential Project

Rasmus Hougaard - Potential Project | Unplugged with Joel aan 't ...

Tony Hsieh

Former CEO of Zappos; Co-Founder of LinkExchange

Zappos: Tony Hsieh : NPR

Bert Jacobs

Co-Founder & Chief Executive Optimist of Life is Good

Gary Hamel

Internationally Renowned Expert on Business Strategy, Professor at London Business School & Author

Innovation Advantages | Gary Hamel | WOBI

Ivy McGregor

CEO & Chief Architect of IVY Inc. Innovative Vision Strategic Consulting; Director of Social Responsibility/BEYGood for Beyonce's Company, Parkwood Entertainment

Lucy Marcil

Co-Founder of StreetCred & Provider of Economic Mobility Services; Pediatrician & Fellow at Boston Medical Center

Jacquelline Fuller

Director of Google.org, Supporting Education, Development, Disaster Relief and Clean Energy Through Charitable Giving

Jessica Shortall

Social Entrepreneur & Author of "Work. Pump. Repeat. - The New Mom's Survival Guide"