The most educated have learned quite a bit, but once you start talking about average populations you find a higher percentage of people in the US belied in evolution 100 years ago than do today.

And when you start taking about actual numbers you find that there are over a billion people that can't read living in the world today. Heck, due to the population increase there are probably more people in the world today that believe the world is flat than did in the 300 BC and there pictures of the thing.