The Cambrian Explosion says shit all about any god, but it is a perfect example of evolutionary adaptation to an increasingly oxygen-rich environment, allowing for the emergence of multi-celled life.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'