In the US, to take a much-cited example, the so-called ‘obesity epidemic’ is almost wholly a product of tens of millions of people with BMIs formerly in the 23–25 range gaining a modest amount of weight and thus now being classified as ‘overweight’, and, similarly, tens of millions of people with BMIs formerly in the high 20s now having BMIs just >30. This movement of population cohorts from just below to just above the formal definitions of overweight and obesity is what public health officials are referring to when they point out that rates of obesity have exploded over the course of the last generation. (Furthermore, there is some evidence that adult and childhood BMI may have ceased to increase, as shown by comparison of NHANES data from 1999 to 2000 and from 2001 to 2002).[/QUOTE]
http://ije.oxfordjournals.org/cgi/content/full/35/1/55
So there have always been comparatively fat and thin people, just as there has always been hetero and homo people.
unless you're only obese by pure BMI standards, and not by health ones.
Well that is the most common measure of obesity in science and the measure that is driving the whole obesity hysteria.
But [most] people are thought by society to be obese because of bad eating and exercise habits.
But is society's thinking right on that count, the studies I have seen seem to show little difference between the eating habits of people with obesity compared with normal weight. The problem is the circular definition over overeating, overeating is eating so that you're fat, so if you're fat whatever you eat, you're overeating. So when a fat person undergoes bariatric surgery and loses a lot of weight (but is still fat) he may be physically able to only consume 700 calories a day but he is still "overeating" because he's maintaining a fat body on that amount.
Though there are some people whom are afflicted by rare diseases which cause obesity (such as MOMO syndrome) the majority of people whom are obese are obese because of poor lifestyle choices.
Is there not the possibility that genetic differences may be (almost) forcing those people to make those decisions? Do you know that when a very fat person loses weight to normal size they burn far fewer calories than someone who is naturally the smaller size? So two people exactly the same weight yet one is practically starving and the other is completely comfortable.