This volume addresses the controversial issue of State succession to international responsibility. It deals with two distinct questions. Firstly, whether or not there is State succession to obligations arising from internationally wrongful acts committed by the predecessor State against a third State before the date of succession. Secondly, whether or not there is State succession to the right to claim reparation as a consequence of internationally wrongful acts committed by a third State against the predecessor State before the date of succession. The work critically examines the arguments advanced by scholars in support and against the transfer of rights and obligations from the predecessor State to the successor State. The unique feature of this book is that it is the most comprehensive examination of past and recent State practice and international and municipal case law for each types of succession of States. The book is also the first study to systematically identify the specific factors and circumstances under which the principles of succession or non-succession should apply.