“World Wide Warfare – Jus ad bellum and the Use of Cyber Force”, one of the most hotly debated issues of this time, is just one out of a variety of interesting topics being dealt with in Vol. 14 (2010) of the Max Planck Yearbook of United Nations Law.As in previous years the Yearbook offers in-depth articles on issues such as Human Rights, UN organs and Commissions as well as questions of international law in connection with the United Nations. The core of authors proves to be a well balanced mix between young scholars and professors from all over Europe.