Complex sentence: Mead introduces the book with a general discussion of the problems facing adolescents in modern society and the various approaches to understanding these problems: religion, philosophy, educational theory and psychology.
Split into simpler sentences: Mead introduces the book with a general discussion of the problems facing adolescents in modern society and the various approaches to understanding these problems. She begins with a discussion of the more standard methods of discussing such issues: religion, philosophy, educational theory and psychology.