Peter Attia: Is the obesity crisis hiding a bigger problem?

As a young surgeon, Peter Attia felt contempt for his obese patient with diabetes. She was overweight, he thought, and thus responsible for the fact that she needed a foot amputation. But years later, Attia received an unpleasant medical surprise that led him to wonder: is our understanding right? Could the precursors to diabetes cause obesity, and not the other way around? A look at how assumptions may be leading us to wage the wrong medical war.

http://www.ted.com/talks/peter_attia_what_if_we_re_wrong_about_diabetes.html