Well, we were talking about the obesity epidemic, which you mentioned was caused by overeating. My point was that if our diets have changed over time (different

Well, we were talking about the obesity epidemic, which you mentioned was caused by overeating. My point was that if our diets have changed over time (different protein/carbs/fat ratio), that in itself can explain overeating. (Rather than assuming that overeating is "something we just do".)