There's ZERO contemporary evidence of Jesus. The four letters are actually all from the same letter. German linguistic scholars settled this yonks ago. There's also no contemporary evidence for Moses. There's also no contemporary evidence for Mohammad. It's clear the leaders in the near Middle East were more than happy to make shit up to consolidate power under their rule (and still do) and that the suckers, errr, patrons/common idiots, ARE more than happy to eat that shit up - even to the point of arguing for MORE.
It should be noted that the human race, over the last 10,000 years has actually seen a REDUCTION in the brain size of about 3-4%. Many think that as civilization arose, moronic people who otherwise would have been weeded out, actually reproduce FASTER! The US population looses 0.8 off the Intelligent Quotient per generation. Others argue our brain is just more efficient. Those people really need to read more here at Sciforums