The gene contains a single 'word', repeated over and over again: CAG, CAG, CAG, CAG ... The repetition continues sometimes just six times, sometimes … - Matt Ridley

What is true of mice is just as true of people. Flies and people are just variations on a theme of how to build a body that was laid down in some worm-like creature in the Cambrian period. They still retain the same genes doing the same job. Of course, there are differences; if there are not, we would look like flies. But the differences are surprisingly subtle.

The fifth method (that is, of analyzing human mating systems) is to compare mankind with other animals that share our highly social habits: with colonial birds, monkeys, and dolphins. As we shall see, the lesson they teach is that we are designed for a system of monogamy plagued by adultery.

É claro que não há um único gene, mas há algo infinitamente mais enaltecedor e magnífico: toda uma naturza humana, flexivelmente pré-ordenada em nossos cromossomos e indiossincrática de cada um de nós. Todo mundo tem uma única e distina natureza endógena. Um self.