Where did you get that idea? Did I ever say I thought there was a danger that most woman would become ultra-thin, explicitly or implicitly? I honestly have no idea what you're talking about.

And I agree, Americans ARE in far more danger of becoming obese these days.  In fact, I pointed out before that I'm annoyed when overweight people use the dangers of being ultra-thin as an excuse to go to the other extreme, as if being fat is healthy and "normal" in the sense that it's to be desired.

For the record, people who are skinny are NOT necessarily healthy, not at all, especially if they eat junk food and never exercise.  With that said, there is mounting evidence that being overweight alone is an independent risk factor for heart attacks, strokes and diabetes.