In short, there was no single hunter-gatherer foraging strategy, and genes no more “designed” our eating behavior than they designed our language or our ways of relating between the genders.
The bottom line about human diet, I believe, is the same as with all human choices. We have great power to create and destroy and with that power comes the responsibility to make thoughtful decisions. Many humans, do not have the luxury to think so deeply about what they eat, but most of us do – including me. I think it’s safe to say that the dietary needs of each of us are basically the same but vary slightly based on a variety of factors. I believe those of us who CAN put thought into the ethics of our food choices SHOULD.