Robert "Bob" Safian

Founder of The Flux Group, Former Editor-in-Chief of Fast Company

Kathy Calvin

President and CEO United Nations Foundation

Kumi Naidoo

Executive Director African Civil Society Centre

Pete Cashmore

Entrepreneur & Founder of Mashable

Helen Clark

Administrator of the United Nations Development Programme, Former Prime Minister of New Zealand

Baratunde Thurston

Futurist Comedian, Writer & Cultural Critic

Ron Garan

Retired NASA Astronaut, Fighter Pilot & Author of "The Orbital Perspective - Lessons in Seeing the Big Picture from a Journey of 71 Million Miles"

Paul Polman

Dutch Businessman; Former CEO of Unilever; Advocate for the UN's Sustainable Development Goals

Ex-Unilever CEO: Climate action will 'unlock economic growth ...

Sir Richard Branson

Businessman, Founder of Virgin Group

Matt Wallaert

Behavioral Scientist, Author of "Start At The End: How to Build Products that Create Change"

How to build products that create change with Matt Wallaert

Melinda French Gates

Co-Chair of the Bill & Melinda Gates Foundation

Geena Rocero

Transgender Model & Advocate; Founder of Gender Proud

Andreas Raptopoulos

Co-founder, CEO at Matternet Inc

Hasan Minhaj

Comedian, Actor, Writer & Star of "Patriot Act with Hasan Minhaj"

Hasan Minhaj COMPLETE REMARKS at 2017 White House

Ertharin Cousin

Distinguished Fellow, The Chicago Council on Global Affairs; former Executive Director, World Food Programme

Claudia Chan

Women's Media Entrepreneur & Founder SHE Summit ClaudiaChan.com

Shiza Shahid

Entrepreneur, Technologist, Investor, Impact Leader & Co-Founder of the Malala Fund

30 Under 30: Shiza Shahid And The Malala Fund | TIME

Jean Case

CEO of the Case Foundation & Author of "Fearless: Five Principles for a Life of Breakthroughs and Purpose"

Tina Wells

Founder, CEO, Buzz Marketing Group

Jack Andraka

Inventor, Scientist, Cancer Researcher & National Geographic Emerging Explorer

How I discovered a test for pancreatic cancer | Jack Andraka