Christopher Pissarides

British-Cypriot Economist; Professor of Economics & Political Science at the London School of Economics; Nobel Prize Recipient in Economic Sciences

Chuck Russell

Charles "Chuck" Russell is an American motion picture director, producer and actor

Claudio Fernandez-Araoz

Partner Egon Zehnder International

Clayton Anderson

Former NASA Astronaut; Author of "The Ordinary Spaceman: From Boyhood Dreams to Astronaut"

Clifford Pickover

Author, The Physics Book: From the Big Bang to Quantum Resurrection

Cynthia McKinney

Former Congresswoman

Dan Siegel

New York Times Best-Selling Author, Neuropsychiatrist, Mindsight Educator & Interpersonal Neurobiologist

Daniel Amen

Award-Winning Psychiatrist & Best Selling Author

Raising Mentally Strong Kids: How to Combine the Power of Neuroscience with Love and Lo...

Daniel Dennett

Professor of Philosophy at Tufts University

Daniel Tani

NASA Astronaut & Engineer

Danielle Upbin

Rabbi/Musician "Reveal the Light"

Dao Nguyen

Publisher at BuzzFeed

Dava Newman

Former Deputy Administrator of NASA; Professor of Aeronautics & Astronautics at MIT; Director of MIT Media Lab

Dava Sobel

Author of 'Longitude', 'Galileo's Daughter' and 'The Planets'

David Aaker

Vice-Chairman of Prophet, Professor Emeritus, UC Berkeley & Author of "Brand Relevance: Making Competitors Irrelevant"

David Anders

David Anders is an American television and stage actor known for "Alias" and "Once Upon A Time"

David Christian

David Christian teaches an ambitious world history course that tells the tale of the entire universe -- from the Big Bang 13 billion years ago to present day.

David Crane

Strategic Advisor Executive at Pegasus Capital Advisors; Former President & CEO of NRG Energy, Inc.; Climate Advocate

David Daokui Li

Prominent Chinese Economist & Director at Center for China in the World Economy

David Eun

President of Samsung NEXT and Chief Innovation Officer of Samsung Electronics