This book offers a comparative study of the major schools of psychoanalysis by exploring their historical development, their differences and similarities, and the underlying assumptions made by each. Encompassing the expertise of colleagues from different schools of psychoanalytic thought, each chapter explores a particular perspective, defining specific theoretical assumptions, theories of etiology, and implications for technique, as well as providing each author's view on the historical development of key psychoanalytic concepts. With contributions from leading authors in the field, and covering both historical and international schools, the book provides an enlightening account that will prove essential to psychoanalytic practitioners and students of psychoanalysis and the history of medicine.