Aaron David Miller

Senior Fellow, Carnegie Endowment for International Peace

Abby Covert

Independent Information Architect, Writer & Community Organizer; Former Senior Staff Information Architect at Etsy

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Achenyo Idachaba

Head of MitiMeth, A Nigeria-Based Environmentally Aware Production Company

Adam G. Riess

Nobel Prize-Winning Astrophysicist

Adam Galinsky

Vikram S. Pandit Professor of Business; Chair of Management Division; Co-author of "Friend and Foe"

Adam Schneider

Principal at Deloitte Consulting focused on Financial Services

Adewale Troutman, MD, MPH, MA, CPH

President, American Public Health Association (APHA); Director, Public Health Leadership & Practice at University of South Florida

Admiral Michael Mullen

Chairman, Joint Chiefs of Staff (2007-2011)

Adnan Nawaz

News Anchor for BBC World

Ajay Gupta

Creator and Host of Technology Today; Cyber security, IT strategy and Their Implications on Business, Global Business and Strategy

Alan Beaulieu

International Economic Analyst & President of the Institute for Trend Research

Alan Blaustein

Founder of CarePlanners

Alan Siegel

Founder and Chairman Emeritus, Siegel+Gale and Champion for Simplicity

Alana Stewart

President of the Farrah Fawcett Foundation to Support Cancer Research, Actress, Talk-Show Host, New York Times Best-Selling Author

Alastair Campbell

Consultant; Strategist; Communicator; Campaigner; Best-Selling Author; Former Director of Strategy & Communications to Tony Blair

Alek Wek

Alek Wek, African Model who graced the cover of Elle MAgazine in November 1997

Alexa Clay

Writer, Culture Hacker, Innovation Strategist & Co-Author of "The Misfit Economy"

Alexa Ray Joel

Lead Vocalist, Songwriter, Classical Enthusiast & Pianist

Alexandra Horowitz

Professor of Psychology, Animal Behavior, and Canine Cognition; Bestselling Author of "Inside of a Dog: What Dogs See, Smell and Know"

Alf Rehn

Author, Speaker & Professor of Innovation, Design, and Management at the University of Southern Denmark