I believe Primitive Man created (and evolved) the gods from their "Original Ignorance" to explain how anything happened. Ancient Man (with the aid of the written word) created and disseminated religions to try to bring some explanation and control over the dirt-ignorant masses. The religions that took hold through conquest and the false promise of eternal life in utopia are what we're basically still stuck with today. It amazes me how rational people today will believe some ignorant, superstitious cave-dweller from 2000+ years ago over the evidence and knowledge we've gained and verified in the last 500 years.
It is in this context I am trying to find some studies, charts, graphs, etc... that show the history of Man's relative IQ. In other words, if you take a Stone/Iron/Bronze Age Man and sit him down and take an IQ test today, how would he do? My 7 year old daughter knows the moon goes around the earth and the earth goes around the sun. She also believes in Santa and the tooth fairy. If she conjoured up a religion, would a billion people follow her?
If "rational" people would just realize they believe in basically the intelligence of the of a 7 year old (or less), maybe they would come to the conclusion it's all baloney. If anyone can point me to some data on mankind's relative intelligence over time (or knowledge base), I will greatly appreciate it.