“The book of nature is like the Bible: Everyone reads into it what they want, from tolerance to intolerance, and from altruism to greed. It’s good to realize, though, that if biologists never stop talking of competition, this doesn’t mean they advocate it, and if they call genes selfish, this doesn’t mean that genes actually are. Genes can’t be any more “selfish” than a river can be “angry,” or sun rays “loving.” Genes are little chunks of DNA. At most, they are “self-promoting,” because successful genes help their carriers spread more copies of themselves.”