What a great historical lesson. My take away is that the Christians set us back 1500 years. About a third of the way through the article is a map by Ptolomy, a 2nd Century Hellenic Egyptian. Not only had he learned from earlier Greeks that the Earth was round, but he a had a pretty good idea of its relative size.
If Christianity would have remained the religion of Jesus instead of transmogrifying into the state-sponsored overbearing and nutty religion about Jesus, I am pretty certain that we would have colonized the moon by now.