Richard Dawkins on The fine-tuning argument
Dawkins treats fine-tuning as an open scientific question, not evidence for God, and favours multiverse explanations over design.
Dawkins acknowledges that the apparent fine-tuning of physical constants is genuinely striking — the universe does appear to be balanced on a knife-edge. But he draws a sharp line between 'this is surprising' and 'therefore God did it.' The design inference, he argues, is a failure of imagination, not a triumph of reason.
His preferred response is the multiverse hypothesis: if there are vastly many universes with different physical constants, it is no surprise that we find ourselves in one compatible with life. This is not special pleading — it is straightforward anthropic reasoning. We could not observe a universe in which we did not exist.
Dawkins also presses the 'who designed the designer?' objection with particular force against fine-tuning. If the universe's constants require an explanation because they are improbable, then a being capable of setting those constants requires an even greater explanation. God, far from terminating the explanatory regress, deepens it.
“The anthropic principle is an alternative to the design hypothesis. It provides a rational, design-free explanation for the fact that we find ourselves in a situation propitious to our existence.”