Evolution, seen from the gene's point of view

When The Selfish Gene was published in 1976, it reframed one of science's most important theories without adding a single new fact. Richard Dawkins did not discover a new mechanism — he offered a new way of seeing the mechanism that already existed. His argument is that natural selection is best understood not as something that favours individuals or species, but as something that favours genes.

Genes, in Dawkins's account, are 'selfish' not in any conscious sense but in a precise mechanical one: they behave as though their only goal is to be copied. Bodies — including human bodies — are the survival machines that genes build to ensure their replication. An animal's drive to survive, feed and reproduce is, from this perspective, the gene working through it.

This framing makes sense of behaviours that had puzzled biologists, including why animals sometimes sacrifice themselves for close relatives. Dawkins explains this through the logic of shared genes: helping a sibling survive is, in genetic terms, a form of helping copies of your own genes persist. Altruism turns out to have a thoroughly unsentimental mathematical foundation.

In the book's final chapters, Dawkins introduced the word 'meme' to describe cultural ideas that spread and replicate in ways analogous to genes. A tune, a phrase, an architectural style — these propagate through minds by copying, varying and being selected, just as genes propagate through populations. It was a speculative analogy that proved extraordinarily generative, spawning an entire field of cultural study.