I was confused. What started the evolution of the children? Did the overlords do that or was it just going to happen anyway via the other 'overwhateverthey were'? Was this explained better in the book? It just seemed like it happened really quick like something jump started it. I also get the impression they had been to Earth before - thus immaculate conception, prophets, Jesus (Jennifer - and the awakening??), demons, etc but they never really said that either.