Not to mention that we would have skipped the Dark Ages.... a period of human history we could have done without....
Well, you have to look at the bright side. During that period, the old pagan religions were finally snuffed out, we got rid of a lot of witches, built cathedrals, recycled pagan manuscripts into prayer books, and shook off that ridiculous Roman fetish for fresh running water and daily baths. Not a bad time, all things considered.