Its really hard to comprehend breeding patterns and their effects though. From history middle to early modern ages, supposedly:
Europeans developed many diseases, while the Chinese were supposedly very healthy people before foreign diseases arrived. The same goes for Indians, yet they were less apt to be able to stand hard labor. Europe was the most ethnically diverse, yet they developed the most diseases. How has breeding habits changed since then, we are mixing races and ethnicities even more today.
Wasnt it mostly just the royalty that had problems with inbreeding? The main evolutionary factor that I see during that time is that the populace was subservient to the will of others and therefore outspoken or brave persons were put down. It may say something about the traits we developed. It was hard to be a hero or die-hard yet we look up to heroes and have developed morals today.
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