I think "staying primal for as long as you can" is the right way to think/go about it. I have a lot of the same concerns as you: how can this planet possibly support 7 billion people all eating primally? (Answer: It can't.) The logic pathway that flows from that conclusion is pretty scary... but! There's no reason you, or I, or any of us should sacrifice our own health just because the right way to eat isn't something that every human being alive can enjoy, given the limits of our planet. Is that elitist? Perhaps. But I don't care. Eating primally certainly isn't *hurting* the earth or anyone else (quite the opposite...).