This textbook examines major theories of personality as they apply to an understanding of our past, present and future selves. Unlike traditional personality textbooks that merely present a succession of different theories, this student-centred volume examines how theories of personality have a bearing on questions that are relevant across the lifespan. A question-and-answer format invites students to approach personality psychology with an active attitude of critical inquiry in their search for objective knowledge and self-discovery. Throughout the text, students are encouraged to evaluate each theory in terms of how much it contributes to an understanding of their own personalities and lives. An instructor's manual is available to lecturers who adopt the book for their courses on request from SAGE.