The philosophy of Levinas has developed over nearly sixty years. Its evolution can be subdivided into three main stages: Following the pre-war writings, the period 1945-1961 lead to the book Totalité et Infini, in which the ethical thought of Levinas takes a first accomplished form. During the last stage, whose central opus is Autrement qu’être (Otherwise than Being), his thought both radicalized and opened up to multiple horizons. Indeed, Levinas is not merely an academic philosopher ignorant of other movements of thought that mark his century. This book aims to show how the stages of Levinas’s strictly philosophical thought is expressed with regard to politics, Judaism, and Christianity.