I hear some people say that they only eat meat and vegetables because they believe that that’s what our ancient ancestors evolved to do best with. A lot of these people also pig out on steaks and eat no grains whatsoever, even if they’re "true" whole grains.
Then I see other sources say that it was the Neanderthals who ate mostly meat and that early Homo sapiens ate a variety of plant life more than they ate meat and that their more flexible diet may have been a possibility why they lived on and why Neanderthals didn’t.
Then I hear others who say that early humans had a lot higher proportion of omega-3 fatty acids in their diet compared to today and that less than 10% of their calories came from saturated fat, which is less than many modern human diets and definitely wouldn’t go along with those who like to pig out on steak all day long.
What did the earlier humans 20,000-40,000 years ago really eat?
And is there scientific evidence that this type of diet would be the healthiest for people now a days? I know that before Isaac Newton’s times, people would make observations and then form theories. Newton then said you have to actually test your theories after you form them. An example could be Sigmund Freud who earlier said that evolution revolves around sex because those who are more successful in that area are more likely to pass on their genes. Then Freud came up with all these sex theories for the mind, that he never tested. He basically claimed they were scientific because they were "inspired" by evolution. Today most experimental psychologists say that much of Freud was pseudo-psychology because using the scientific method involves testing your theories, not just saying a theory is good enough because it sounds scientific. So that’s why my second question is if there’s any scientific evidence that a cave man diet would be beneficial to humans? Like I know that they didn’t have medical technology 20,000-40,000 years ago, but regardless medical technology seems to be making people live longer. I’ve also heard that there are studies that whole grains are good for you, which probably weren’t around back then.
Thanks for any information you may have, even if it’s just partial 