The benefits of a "Paleo" diet may be at least partially dependent upon what kind of paleo ancestors you had. And how you define a paleo diet.
I remember reading some years ago (and I wish I could remember the source and learn whether those findings have been duplicated) that over thousands of years the diet of the human race was optimized to match the available food sources of different regions and lifestyles.
And that there were 3 different basic types the researcher identified. If your genes were derived from primarily one of these groups, your digestion would do best with those kinds of foods.
The 2 oldest were fish-seafood, and meat-animal products. The 3rd more recent was agricultural, mainly grains. So that if your genes descended primarily from one of those groups, that's the kind of food that is "paleo" for you, on which your body will do best.
It may be meat & animal products, but it may be one of the other food groups. Or possibly a mix, reflecting shared gene pools, more common in this modern era of few natural borders of distance and other travel limitations.
I dunno what my paleo diet would be. I seem all my life, since a kid, to naturally gravitate to foods that today I'm told are my most healthy. Based on studies of the US population, which is still heavily influenced by European ancestry, including my own northern European "stock".
I've never been a big eater of red meats, preferring fish or poultry instead. If my neolithic ancestors were killing & eating the late Ice Age big game shown on cave paintings it wasn't passed on to me.
