Dawkins broke new ground in the theory of evolution with his book The Selfish Gene. He has contnued to promote the Darwinian cause in The Extended Phenotype and The Blind Watchmaker. His River Out of Eden is the river of DNA, a river of information that defines the genetic make-up of the species, uninfluenced by the experiences and acheivements of that species, and uninfluenced by another powerful source of potential contamination: sex. He discusses his theories of sexual recombination and the new tributaries of his DNA river with The Telegraph's Matt Ridley, author of The Red Queen.