To be fair, if two 'billion' <spit> people shared the same experience, it might be indicative of something. Ergotism, perhaps, or some kind of mental psychosis on an unprecedented scale. The real question is, have we actually got two 'billion' <shudder> people who can be shown, beyond reasonable doubt, to have actually shared anything like this stuff?
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.'