Neil Woods is a former undercover police officer in the UK, author of the book Drug Wars, and a member of the reform group Law Enforcement Action Partnership.

Robin Hanson is an economist at George Mason University. He is the author of a number of books, including The Age of Em and The Elephant in the Brain. His blog is called Overcoming Bias.

Forrest Gander is a poet, translator and novelist, whose 2018 poetry collection, "Be With," won the Pulitzer Prize. His most recent collection of poems is, "Twice Alive."

David Burns is considered one of the founders of CBT and is a psychiatrist and professor at the Stanford School of Medicine. He is author of "Feeling Good," which sold over three million copies, and most recently wrote, "Feeling Great."

Bill Ayers is a former leader of the Weather Underground and professor of education at University of Illinois at Chicago.

Ross King is a novelist and historian who has authored a number of books about Renaissance artists, including, "Leonardo and the Last Supper" and "Brunelleschi's Dome."

James Fallon is a neuroscientist at UC, Irvine. He is the author of, "The Psychopath Inside."

Benjamin Teitelbaum is a professor of ethnomusicology and international affairs at University of Colorado, Boulder, and the author of, "War for Eternity: The Return of Traditionalism and the Rise of the Populist Right."

Richard Norman is a professor of moral philosophy at the University of Kent, and the author of, "On Humanism."

Clint Penick is a former punk musician and the current head of Penick Lab at Kennesaw State University, where he studies social insects.