Ari Wallach helps leaders more consciously and ethically shape tomorrow.

Dr. George Blair-West is an author, researcher and doctor specializing in psychiatry.

Author and entrepreneur Rob Reid writes speculative fiction for Random House.

Pushing his body through epic cold-water swims, Lewis Gordon Pugh wants to draw attention to our global climate. He's just back from swimming in a meltwater lake on the slopes of Mount Everest.

Dr. Suzie Sheehy uses accelerator physics to help reinvent technology for applications in medicine, energy and beyond.

Jonathan Haidt studies how -- and why -- we evolved to be moral and political creatures.

Ze Frank has been involved in online comedy, web toys and virtually shared experiences for the past 20 years as an influencer, performer, executive and mischief maker.

Filmmaker Jeremy Gilley founded Peace One Day to create an annual day without conflict. And ... it's happening. What will you do to make peace on September 21?

Rishi Manchanda is an "upstreamist." A physician and public health innovator, he aims to reinvigorate primary care by teaching doctors to think about—and treat—the social and environmental conditions that often underly sickness.

Kathleen "Katie" McGinty is vice president and chief sustainability and external relations officer for Johnson Controls, a global leader for smart, healthy and sustainable buildings technology. Johnson Controls signed The Climate Pledge in 2021, joining hundreds of leading global companies with a commitment to be net-zero carbon by 2040.

Bruce Feiler is a leading voice on family, work, transitions and meaning.

Barry Schwartz studies the link between economics and psychology, offering startling insights into modern life.

Magician

Immersing himself in alternate lifestyles and hilarious experiments (usually with himself as the guinea pig), writer A.J. Jacobs tests the limits of behavior, customs, culture -- and reports back on the wisdom and practical knowledge he's gained.

Priti Krishtel wants to reinvent the patent system. A lawyer and veteran of the global access to medicines movement, she is exposing how the failures of the patent system are affecting all of us -- and how we can fix it.

Franklin Leonard is a film producer, cultural commentator, professor, activist and entrepreneur.

Stellar Astronomer

A National Geographic Explorer-in-Residence, Wade Davis has been described as “a rare combination of scientist, scholar, poet and passionate defender of all of life’s diversity.”

Blaise Agüera y Arcas works on machine learning at Google. Previously a Distinguished Engineer at Microsoft, he has worked on augmented reality, mapping, wearable computing and natural user interfaces.

Sethembile Msezane deconstructs the act of public commemoration -- how it creates myths, constructs histories, includes some and excludes others.

Andrew Solomon writes about politics, culture and psychology.

Danny Dorling teaches and writes about the geography of our human world.

Paul Hessburg studies very large forest landscapes and what makes them tick.

Journalist Steven Petrow writes about manners and civility.

Tyler DeWitt recognizes that textbooks are not the way to get young people interested in science. Instead, he teaches science by making it fun and fantastical.

Darieth Chisolm is an Emmy-winning television personality, former NBC News Anchor, entrepreneur, author, international speaker and life and business coach.

Rébecca Kleinberger is a voice expert pursuing research as a PhD candidate in the MIT Media Lab’s Opera of the Future group.

Rick Smolan is the co-founder of the America 24/7 and Day in the Life photography series -- and a natural storyteller in many media. His latest books are America at Home and Blue Planet Run.

For more than 25 years, activist and advocate Tarana J. Burke has worked at the intersection of racial justice and sexual violence.

Dr. Darria Long leverages the best of science to make lives healthier, better and easier.