That's nonsense. You can theorize all you want about how we evolved, how obesity is not totally our fault...a typical cop-out (with a very few exceptions)..."blame something or somebody other than yourself." Ever heard of taking responsiblity for your own actions?
It's very simple, as others have pointed out - eat less, eat better, and get some exercise. We also evolved with a brain in our head and it has a function - to allow us to think. Thinking about what we're eating (not just how much of it, but what kind of food) can lead to all kinds of wonderful improvements.
You can’t argue with evolution, countryboy. Evolution is survival of the fittest, and until very recently, it was the obese gene which was the fitter of the two. The abundance of food is fairly recent in origin. Until say a couple of hundred years ago, most people were involved in subsistence farming, food was scarce and expensive.
Why do you think people were skinnier in the old days, why obesity was not as prevalent in the old days? Do you think people were more knowledgeable, more responsible in old days? Don’t you believe it. In the old days, fatty foods, refined sugar etc. were just not available, or were very expensive. So people just couldn’t afford to eat rich food and get fat.
In the old days, when food was scarce, obesity was a distinct advantage. These days, with ready and cheap availability of food, obesity has become a liability, but historically it wasn’t so.
So you can mouth all the platitudes you like, eat less, eat better, exercise etc. (and that is all good advice, don’t get me wrong). However, the underlying reason why many people are prone to obesity lies in evolution.