I went searching for a great article I read on this lately but couldn't find it: the gist is that until schools become de rigueur, adolescents never spent time together as a group as they would be at work/apprenticeships whathaveyou with adult 'supervision'. It's a new phenomenon that leaves delicate minds in a Lord of the Flies situation. The study I read showed that even the 'cool' kids thought they weren't cool and the various coping mechanisms have been fodder for hollywood movies and novels since the last decades.