It represents a time which lacked many conveniences that we have today, like flying cars --oh wait! Kidding of course! I would guess it has to do with diet (and

It represents a time which lacked many conveniences that we have today, like flying cars --oh wait! Kidding of course! I would guess it has to do with diet (and yes, maybe a little lack of exercise, etc.). By now, we have a couple of decades of poor eating under our belt (sorry for the poor pun)...By this i mean, that we're collectively eating more processed foods, etc.