Please don't take that as my personal opinion, just a point for a good argument. If you have a nice family, raised and supported kids well into their adulthood, that is all very nice on a personal level, but globally what have you done? I by no means expect everyone to be the next Henry Ford or Edison, but if you're just living your life, you're just consuming planet's limited resources. Animals have lived like that for millions of years, sustainably, in a self balancing act. But I feel that humans are savvy enough to strive for more than just the daily grind and consumption, so that the world they leave behind is a better place, not worse.