David Wolpe is an American rabbi, and Visiting Scholar at Harvard Divinity School. He was named the most influential Rabbi in America by Newsweek in 2012.

Joe Schmid is a PhD student in philosophy at Princeton University. He graduated with a B.A. in philosophy from Purdue University in 2022. He has published articles in metaphysics, philosophy of religion, and philosophy of time, and the author of books including "Existential Inertia and Classical Theistic Proofs". He runs the YouTube channel, "Majes…

John Nelson holds a PhD in Biblical Studies from the University of Edinburgh. His thesis is the first book-length study of Jesus' physical appearance in the Gospels. He runs a weekly Substack called "Behind the Gospels" which aims to make Biblical studies accessible to all.

Joe Folley is the creator of the YouTube channel "Unsolicited Advice" which creates short, digestible philosophical videos on a wide range of topics. He joins me today to discuss nihilism: its history, its meaning, and its significance in philosophy.

Steven West is the host of "Philosophize This!" one of the world's most popular philosophy podcasts. Listen to it here.

Iain McGilchrist is a psychiatrist, writer, and former Oxford literary scholar. McGilchrist came to prominence after the publication of his book The Master and His Emissary, subtitled The Divided Brain and the Making of the Western World.

Andrew Mark Henry is a scholar of religious studies. His research focus is early Christianity and late Roman religion. He earned his PhD at Boston University. His YouTube channel is "Religion for Breakfast".

Elaine Pagels is an American historian of religion. She is the Harrington Spear Paine Professor of Religion at Princeton University. Pagels has conducted extensive research into early Christianity and Gnosticism. See me speak at Level Up in Atlanta this June: http://levelupconferences.org/

Coleman Hughes is an American writer and podcast host. He is the author of "The End of Race Politics: Arguments for a Colorblind America".

Justin Sledge is currently a part-time professor of philosophy and religion at several institutions in the Metro-Detroit area and a popular local educator. His YouTube channel is "Esoterica".

Rory Stewart is a former UK Government minister, MP, and deputy governor in Iraq following the western invasion. He walked on foot for two years across Afghanistan, Iran, Pakistan, India and Nepal in 2002. He was a private tutor to both Prince William and Prince Harry. He now co-hosts The Rest is Politics with Alastair Campbell, one of the UK's mos…

A.C. Grayling is a British philosopher and author. In 2011 he founded and became the first Master of New College of the Humanities, an independent undergraduate college in London. Buy "Who Owns the Moon?" here.

Thank you all for 750,000 subscribers on YouTube!

Sam Harris is a neuroscientist, philosopher, New York Times best-selling author, host of Making Sense, and creator of Waking Up.

Carlo Rovelli, an Italian theoretical physicist, is known mainly for his contributions to research in the field of quantum gravity. He is the author of Seven Brief Lessons on Physics, The Order of Time, and White Holes, amongst other works.

William Lane Craig is a Christian philosopher and public speaker, who today makes his third appearance on Within Reason. We discuss why Richard Dawkins refuses to debate him, and whether Old Testament slaughter can be justified.

Michael Knowles is an American conservative Catholic political commentator and media host. He has worked for the Daily Wire since 2016.

David Deutsch is a British physicist at the University of Oxford. He is a visiting professor in the Department of Atomic and Laser Physics at the Centre for Quantum Computation in the Clarendon Laboratory of the University of Oxford. (Wikipedia.) Buy David Deutsch's book, The Beginning of Infinity

Susan Neiman is an American moral philosopher, cultural commentator, and essayist. She is the author of "Left is Not Woke", available here.

Robert Sapolsky is an American neuroendocrinology researcher and author. He is a professor of biology, neurology, neurological sciences, and neurosurgery at Stanford University. He is the author of "Determined: A Science of Life Without Free Will", which you can purchase here.

Sheehan Quirke is known online as the Cultural Tutor. With over 1.6 million followers on X, he writes daily threads about art, architecture, and history.

Jason Brennan is an American philosopher and business professo at the McDonough School of Business at Georgetown University. Brennan writes about democratic theory, the ethics of voting, competence and power, freedom, and the moral foundations of commercial society. (Wikipedia.) He speaks in this episode about the faults and flaws of democracy, and…

Jonathan Pageau is a French Canadian icon carver, public speaker and YouTuber exploring the symbolic patterns that underlie our experience of the world, how these patterns emerge and come together, manifesting in religion, art and in popular culture. He's also the editor of the Orthodox Arts Journal and host of the Symbolic World blog and podcast.…

Richard Dawkins is an evolutionary biologist and author of books including The Selfish Gene and The God Delusion.

Ben Thomas, better known online as Sisyphus 55, is a philosophy YouTuber with one million subscribers. His videos cover topics including nihilism, existentialism, love, relationships, and political philosophy.