Are the media part of it? Yes. That's where prevention efforts really need to be targeted, at changing social....
“Weightism” is what it's called—in other words, the attitudes of our society about weight and about, as you said, what's perfect, what's beautiful. We don't want our daughters growing up aiming for an unhealthy BMI. We want to try to change that so that females are accepted at their normal sizes.
Having said that, those of us who work on eating disorder teams are completely overwhelmed by the number of referrals. I always feel like I'm drowning. I work many, many overtime hours, as do all of the people in the same field. We don't have any time to put into prevention efforts.