Viruses of the Mind Viruses of the Mind "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 previously expressed by Dawkins 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
On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection Letter" from Darwin to Asa Gray. This was the first announcement of the Darwin – Wallace theory of evolution by natural selection; the papers appeared in print on 20 August 1858. The presentation of the papers spurred Darwin to write a condensed "abstract" of his "big book" on "Natural Selection". This was published in November 1859 as "On the Origin of Species". On the voyage of the "Beagle" the young Charles Darwin took a break between graduating and starting his career as a clergyman to study the natural history of South America, an interest he had developed at the University