Columbia Business School Professor & Best-Selling Author of "The Art of Choosing"
Sheena Iyengar: Lead by Choice
Managing director, Rockefeller Foundation and Former Senior Editor, The Economist
Founder and CEO, DonorsChoose.org
Leading Geo-Strategist & Author
Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation
Political Philosopher, Author & Distinguished Professor
Professor; Science Historian; Philosopher; Author of "The Philosophical Breakfast Club"