Johann Hari is a writer and journalist. His new book “Lost Connections” is available now.

Forrest Galante is an international wildlife adventurer and conservationist. He's also the host of "Extinct of Alive" on The Animal Planet. https://www.instagram.com/forrest.galante

Bill Ottman is an Internet entrepreneur and freedom of information activist based, and is also the CEO and co-founder of Minds. http://www.minds.com

David Foley is an actor, stand-up comedian, director, producer and writer. Paul Greenberg is an actor, comedian and voice actor. Together they host "Don't Say.. with Paul & Dave" available on iTunes.

Pat McNamara spent 22 years in the United States Army in many special operations units. He is currently training people in tactical marksmanship and combat strength.

Andrew Yang is an American entrepreneur, the founder of Venture for America, and a 2020 Democratic presidential candidate.

Jack Dorsey is a computer programmer and Internet entrepreneur who is co-founder and CEO of Twitter, and founder and CEO of Square, a mobile payments company. Vijaya Gadde serves as the global lead for legal, policy, and trust and safety at...

Dr. Phil McGraw is an author, psychologist, and the host of the television show "Dr. Phil."

Donnell Rawlings is a stand up comedian, actor, and podcaster. He's known best for his roles on Chappelle's Show and The Wire.

Timothy Denevi is a professor in the MFA program at George Mason University and he is the author of "Freak Kingdom: Hunter S. Thompson's Manic Ten-Year Crusade Against American Fascism."

Joe is joined by UFC Welterweight Champion Kamaru Usman.

Lennox Lewis is a three-time world heavyweight champion, a two-time lineal champion, and remains the last heavyweight to hold the undisputed title. Russell Peters is an actor and standup comedian, currently touring internationally all over...

Kevin Hart is a comedian, actor and producer. His new stand up special "Kevin Hart: Irresponsible" is now streaming on Netflix.

Lenny Clarke is a legendary Boston comic and actor.

David Wallace-Wells is Deputy editor and climate columnist for New York magazine. His book "The Uninhabitable Earth: Life After Warming" is available now.