It is very difficult for the student or practitioner to find their way through the jungle of different personality typographies that has sprung up in the field of psychotherapy; and even harder for them to compare one system with another. This volume offers help by surveying how different schools of therapy approach a basic topic, the differences between people - including their attitudes, feelings, concerns and talents. It examines different systematic and non-systematic approaches to identifying different types of human being, exploring whether there are systematic ways in which humans vary, how we can assess the merit of different typologies, and whether personality typing is a helpful approach to therapy.