Here's how to be a superstar in the world of Darwinist extremism, like Richard Dawkins: You write 50 pages of shocking text taking a metaphor like 'the selfish gene' quite literally. Then, you slip in one sentence saying something to the effect that, 'Of course, this is all just a metaphor!' Then you go back to writing as if it were literally true for another 50 pages.
It is as though one kept insisting that snow is black, very, very dark, reflects no light, and so on, and then paused once in a while and wrote, 'Of course, I know that snow is really white!' Calling snow black is not a metaphor, it's a simple falsehood. And so is calling genes 'selfish'.
Furthermore, 'Dawkins’s crude, cheap, blurred genetics is not just an expository device. It is the kingpin of his crude, cheap, blurred psychology'. (Mary Midgley)