I hold out hope that one day we can get to a point where humans can leave the earth in a better state than when we entered it. We certainly have the intelligenc

I hold out hope that one day we can get to a point where humans can leave the earth in a better state than when we entered it. We certainly have the intelligence to do so. So I am not throwing in the towel just yet. Of course, there is an optimal population number somewhere between 0 and infinity.