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Originally Posted by jbischke  *Cons*
2. The fact of the matter is that even though our ancestors were leaner and persumably healthier than we are today as a society, they also had a much shorter life span. So I'm trying to reconcile the health benefits of a diet based around people who lived only a third as long as we do.
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I meant to reply to this point a while ago but I forgot about it. I'll reply now. While the average age of someone living in the caveman era was certainly low (like 35-45), it's also probably the least important number to think about. That's because of things like high infant mortality rates and childhood deaths. Those are things that we don't have anymore. The more important number is expected lifespan of adults which was more like sixty to seventy back then, pretty close to what it is now. It would be a little bit higher than that if we factored out deaths from plagues that we can now cure.