The Evolution of Cooperation insects, where the workers – which are sterile, and therefore incapable of passing on their genes – benefit the queen, who is essentially passing on copies of "their" genes. This is further elaborated in the "selfish gene" theory of Richard Dawkins, that the unit of evolution is not the individual organism, but the gene. (As stated by Wilson: "the organism is only DNA's way of making more DNA.") However, kinship selection works only where the individuals involved are closely related; it fails to explain the presence of altruism and cooperation between unrelated individuals, particularly across species. In a 1971 paper
The Evolution of Beauty to encourage readers to accept his arguments on political rather than scientific grounds. Gail Patricelli, Eileen Hebets, and Tamra Mendelson, while describing the book as containing "engaging descriptions of the natural world", criticize Prum's reasoning, description of modern sexual selection research, and conclusions. The Evolution of Beauty The Evolution of Beauty: How Darwin's Forgotten Theory of Mate Choice Shapes the Animal World—and Us is a 2017 book by the ornithologist and evolutionary biologist Richard O. Prum about the power of aesthetic mate choice arguing it to be an important independent agent in evolution. Prum indicates that while Charles Darwin made