Fundamentally, we have converted a world in which calories were relatively scarce and hard to get and physical activity unavoidable into a world where physical activity is scarce and hard to get and calories are unavoidable.

We now must act boldly to combat the obesity epidemic. There are many opportunities across the lifespan, but it will require a shift in social norms and an unprecedented social movement for obesity prevention.

To win, we have to lose. So reads the slogan of "The Weight Of The Nation," the four-part documentary that premiered on HBO last night, and continues ...

By focusing on health, we can address real health concerns, giving both fat and thin people the support they deserve and avoiding stigmatizing people and worsening the problem.