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 Calpurnia Tate natural world ..." It was the recipient of numerous awards including a 2010 Newbery Honor Award, and also honored with the IRA Children's Book Award, the North Carolina Young Adult Book Award, the TN YA Volunteer State Book Award ML, the Virginia M. Law Award., the Josette Frank Award and the Judy Lopez Book Award. It was included in Chicago Public Library Best of the Best list, the Illinois Rebecca Caudill Young Readers Choice Award Master List, the Texas Lone Star Reading List and was a 2009 Junior Library Guild Selection. The Evolution of Calpurnia Tate The Evolution of Calpurnia