Let’s illustrate it this way. Let me tell you how to become a multi-billionaire the way Dawkins explains evolution, whether of the eye or anything else. We’ll start off by assuming that you already have accumulated $999,999,000. You can see that it would be only a small step from there to becoming a billionaire. You only need $1,000 more—and it would only take a million such steps had we started off with $1,000 at the beginning.