Most of the girls just have a sheep mentality and do what they think is the right thing,unlike men their hierarchy is not based on money or power but mostly on who gets more attention from men.
In a group of women the "leader" is usually the woman married to the better man while the last one is the ugly girl who's not even asked out,therefore this is applied to high school girls where the "leader" is the girl who gets more attention from the cool guys.
Since cool guys only go for one thing it's easy to understand that the slvttier she looks the more she get attentions,therefore the other girls try to emulate her.
You can see similar things in men where we pump our muscles(strenght peacocking,respect), work to death (money,status), crime/white collar crimes (money).
In a group of women the "leader" is usually the woman married to the better man while the last one is the ugly girl who's not even asked out,therefore this is applied to high school girls where the "leader" is the girl who gets more attention from the cool guys.
Since cool guys only go for one thing it's easy to understand that the slvttier she looks the more she get attentions,therefore the other girls try to emulate her.
You can see similar things in men where we pump our muscles(strenght peacocking,respect), work to death (money,status), crime/white collar crimes (money).