I don't know about great for humanity, but sustainable probably. I sit behind a keyboard for a living; while I might harbor some romantic notions about a pastoral life, deep down I know I'm not cut out for it. And the heat index where I live now gets into the one-teens every summer so I really don't think I'm cut out for it.

Also, I'm not one to complain about downvotes - I can take my knocks, but I'm a bit surprised that my comment is rather disliked; it's just my thought at that moment.