Once upon a time, the luminiferous aether was a plausible, rational explanation that tied things together in a cohesive manner. It also turned out under scrutiny not to exist and to be unnecessary to reality.
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.'