> Adult initiation rituals tend to be 13-14 in every pre-industrial society (current and historic) because that's when it happens biologically; it is therefore not a surprise, in Western countries where it's delayed by a decade, that the people from 14-25 are not developing correctly.

I don't know how to define 'correctly' here, but in politically and economically advanced countries they develop in much more healthy and productive ways. People who are forced to be adults at 15 often never get a chance to mature.