Originally posted by Lord Feron
People do get smarter "our ability to understand reality has gotten better over time" that's an elaborate way of saying it but essentially the same. A child learning is him exploring his reality/world and learning is the same thing the human race has been doing but at a higher level. We discover things and see how they work. We build upon that so yes Humans have gotten smarter since the medieval. Ppl did some seriously ****ed up shit just to cook, get better from sickness, and other fairly basic thing that they did totally backwards.
And yet if I dropped you in Papua New Guinea I imagine you'd feel rather stupid compared to the uneducated people who live there because they can survive there and you can't. Intelligence doesn't increase over time it just changes form. The majority of intelligent people are morons in a lot of subjects while "simple people" are rather adept when it comes to their areas of expertise. Do you know how to forge a suit of chainmail? Probably not but a "medieval moron" blackmith could. On your point of medicine: have you ever taken some pill that you knew nothing about but you decided to take it anyway because your doctor prescribed it? If so then its proof that people still aren't any smarter than when they took leaches to cure infections.
Superman would still appear to be a God to most people today because though we act like we know better now we're still ready to believe anything.