Does anyone have an opinion on this statement, no wrong answers , just consulting the Nive-mind (working title):

For two hundred thousand years, our body’s appetite and weight-control systems functioned well. They even worked during the US boom years from the 1940s through the 1970s, when food was just as abundant as it is today. And just like today, almost everyone had an automobile—we weren’t walking everywhere—and jogging and gym-going were relatively rare. Our systems still worked. Then, for some reason, they failed: we started getting heavier and heavier.