"Viruses of the Mind" is an essay by British evolutionary biologist Richard Dawkins, first published in the book Dennett and His Critics: Demystifying Mind (1993). Dawkins originally wrote the essay in 1991 and delivered it as a Voltaire Lecture on 6 November 1992 at the Conway Hall Humanist Centre. The essay discusses how religion can be viewed as a meme - an idea which Dawkins had previously expressed in The Selfish Gene (1976). Dawkins analyzes the propagation of religious ideas and behaviors as a memetic virus, analogous to how biological and computer viruses spread. The essay was later published in A Devil's Chaplain (2003), and its ideas are further explored in Dawkins's documentary television programme The Root of All Evil? (2006).