Jennifer Aaker

Professor of Marketing at the Stanford Graduate School of Business & Author of "The Dragonfly Effect"

Jill Abramson

Former Executive Editor of The New York Times

Sylvia Acevedo

CEO of Girl Scouts of the USA; Entrepreneur Addressing the Challenge of Universal Access to Education; Engineer & Rocket Scientist

Shawn Achor

Harvard Professor, Researcher & Positive Psychology Expert; Author of "The Happiness Advantage" and "Big Potential"

Shawn Achor on happiness as a competitive advantage

Jon Acuff

Lead Pastor, Christian Speaker; New York Times Bestselling Author of "Do Over"

Adam Cheyer

Top Technology and AI speaker, Co-Founder & VP Engineering of Siri & Viv Labs

Adam Back

Cryptographer & Crypto-hacker; Co-founder & CEO of Blockstream

Adam Ostrow

Chief Digital Officer, TEGNA

Adam G. Riess

Nobel Prize-Winning Astrophysicist

Adam Gazzaley

Founder & Executive Director of Neuroscape; Professor in Neurology, Physiology and Psychiatry at UCSF

Eric Ryan & Adam Lowry

Co-Founders of Method Products, Inc.

Scott Adams

Creator of the Popular Comic Strip "Dilbert", Chief Strategy Officer for WhenHub & Author

Gerry Adams

President, Sinn Fein

Lynsey Addario

American Photojournalist; Contributor for National Geographic & Time Magazine

Chimamanda Ngozi Adichie

Renowned African Novelist & Speaker

Ron Adner

Professor of Strategy and Entrepreneurship at the Tuck School of Business at Dartmouth College

Anant Agarwal

CEO of edX & Professor at MIT

David Agus

Professor of Medicine and Engineering at the University of Southern California, Co-Founder of Navigenics & Author of "The End of Illness"

Dr. David Agus Gives an Optimistic Outlook for COVID-19 Pandemic

Dirk Ahlborn

Entrepreneur & Investor; Founder & CEO of Hyperloop Transportation Technologies; CEO of JumpStarter Inc.

Luis von Ahn

Founder and CEO of reCAPTCHA and Duolingo