Bishop Robert Barron is the founder of Word on Fire Catholic Ministries and Auxiliary Bishop of the Archdiocese of Los Angeles. He is also the host of CATHOLICISM, a groundbreaking, award-winning documentary about the Catholic Faith, which aired on PBS.

Bishop Barron has published numerous books, essays, and articles on theology and the spiritual life. He is a religion correspondent for NBC and has also appeared on FOX News, CNN, and EWTN.

Bishop Barron's website reaches millions of people each year, and he is one of the most-followed Catholics on social media. His regular YouTube videos have been viewed over 20 million times and he has over 1.4 million followers on Facebook.

John L. Allen, Jr., is the editor of Crux, specializing in coverage of the Vatican and the Catholic Church and the author of a number of books on religion, including most recently The Global War on Christians.