The Four Horsemen of atheism

Overview
Richard Dawkins, Daniel Dennett, Sam Harris, and Christopher Hitchens are often collectively referred to as "The Four Horsemen" in reference to the Biblical Four Horsemen of the Apocalypse and the fact that all four of them have advocated against the practice of religion.

Video

 * The Four Horsemen 2-hour discussion:
 * hour 1
 * hour 2