Charles Duhigg is an American journalist and non-fiction author.

Sophie Gilbert is a British-born writer and journalist who works at The Atlantic in Washington, D.C., United States..

Paul Kleinman was born in New York City, New York, and grew up in White Plains, New York. He graduated from the University of Wisconsin in 2009 with degrees in Art and Communication Arts: Radio, Television and Film. He is the author of works including *Philosophy 101: From Plato and Socrates to Ethics and Metaphysics, an Essential Primer on the History of Thought*.

Gad Saad (born 13 October 1964 in Beirut, Lebanon) is a Canadian marketing professor at the John Molson School of Business at Concordia University. He has argued for applying evolutionary psychology to marketing and consumer behaviour. He is the bestselling author of *The Parasitic Mind* and *Suicidal Empathy: Dying to Be Kind*, and is also known as a writer and producer.

Barbara Ellen Kingsolver is an American novelist, essayist, and poet.

Jonathan David Haidt is an American social psychologist and author.