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 most popular shows.

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!