Richard Dreyfuss

Academy Award-Winning Actor

Catherine Crier

Acclaimed Author, Former Judge, Award-Winning Journalist & Television Broadcaster

Naomi Oreskes

Geologist & Earth Science Historian

Jurnee Smollett

Actress & Singer

Graham Hill

Founder of Life Edited & TreeHugger.com

Annabelle Gurwitch

Actress & Humorist

Jeremy Rifkin

Leading Global Technologist, Futurist, Authority on World Economic & Environmental Trends

Ashley Judd

Actress, Activist & Humanitarian

Erin Gruwell

Founder & Executive Director of the Freedom Writers Foundation; Education Reform Advocate

Hugh Evans

Humanitarian; Founder & CEO of Global Poverty Project

Ayana Elizabeth Johnson

Marine Biologist, Conservation Strategist, Founder & CEO of Ocean Collectiv

What If We Get It Right?: Visions of Climate Futures

Cynthia Lowen

Filmmaker of Bully & Poet

Alicia Silverstone

Actress & Animal Rights Activist

Robert Bryce

Energy Expert, Veteran Journalist & Acclaimed Author

Venus Williams

Professional Tennis Player, Four-Time Olympic Gold Medalist, Equal Pay Activist, Author & Entrepreneur

Ted Turner

Media Mogul & Philanthropist

Lyn St. James

Racecar Driver & Activist

Mariane Pearl

Widow of Journalist Daniel Pearl

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Hill Harper

Best-Selling Author, Tech Entrepreneur, Investor, Philanthropist & Actor; Best Known For "CSI: NY" & "The Good Doctor"

America Ferrera

Award-Winning Actress, Producer & Humanitarian

Gro Harlem Brundtland

Former Director-General, World Health Organization

Sophia Bush

Actress, Humanitarian & Author

Elizabeth Cohen

Senior Correspondent for the CNN Health, Medical, & Wellness Unit

Elizabeth Cohen - CNN news story on baby formula shortage

Rick Ridgeway

Environmentalist, Mountaineer, Expedition Author, Former VP of Environmental Initiatives & Special Projects at Patagonia

Martha Williamson

Martha Williamson is a 20-year veteran of the entertainment industry.

Beth Simone Noveck

Founder & Director of The Governance Lab; Professor & Author of "Solving Public Problems"

Jalen Rose

Former ESPN Analyst & NBA Player

Dambisa Moyo

Global Economist, Author & Investor in the Future

Maria Bello

Actress, Activist & Vital Voices Global Ambassador