An Unchanged Mind begins with a clinical riddle: Why are American teenagers failing to develop normally through adolescence? We are presented with case studies from a therapeutic boarding school for troubled teenagers: All new students had been deemed treatment "failures" after conventional psychiatric care. All were bright teenagers, full of promise, not obviously "ill." Yet they found themselves unprepared for the challenges of modern adolescence and inevitably failed-at school, at home, and socially among their peers.