we're the most out of shape, most depressed, most overworked that we've ever been as human beings.

I believe so too. Perhaps with the advancement of science and technology the old values of whats good and right aren't practiced anymore. New norms of society and the roles they assign to us make us run 24/7. Not all of those new norms are imposed on us, mind you, but we tend to follow them anyway. Like a herd. Pointless dilly-dallying on facebook/instagram, for instance.