Aaron David Miller

Senior Fellow, Carnegie Endowment for International Peace

Achenyo Idachaba

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

Adam Scorgie

Independent Filmmaker Known for "The Union: The Business Behind Getting High" and the Followup "The Culture High"

Adewale Troutman, MD, MPH, MA, CPH

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

Adnan Nawaz

News Anchor for BBC World

Agapi Stassinopoulos

Inspirational Teacher & Best-Selling Author; Known for "Wake Up to the Joy of You: 52 Meditations and Practices for a Calmer, Happier Life"

Ai-jen Poo

Co-founder of National Domestic Workers Alliance; Director of Caring Across Generations, Co-founder of Supermajority

Ailsa Chang

Host, All Things Considered, Former Co-host of "Planet Money" Podcast

Ajay Gupta

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

Alan Gregerman

Humorous Authority on Strategy, Innovation and Success

Alan K'necht

Conference speaker, Lecturer, Author, Columnist & Internet Strategist

Alan Siegel

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

Alanna Shaikh

Global Health & International Development Writer, TED Fellow, Alzheimer's Disease Advocate

Alberto Ruis-Gallardon

Spanish Politician; Former Spanish Minister of Justice; Former Mayor of Madrid

Alejandra Schrader

Award-Winning Author, Plant-Based Nutrition Certified Chef, Food TV Personality & Activist

Alek Wek

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

Alexandra Morton

Business Consultant & Founding President of NPO Global LLC

Alexis Madrigal

Senior Editor at The Atlantic & Author of "Powering the Dream: The History and Promise of Green Technology"

Alfred Poor

Health Tech Futurist & Writer

Alfred Poor, The Health Tech Futurist

Alison Gopnik

Professor & World Leader in Children's Learning and Development