Ruchi Anand's fine book helps us think our way through this complex thicket of norms, ideas, practices, and scholarly debates. She makes excellent use of both the rationale of jurists for the outlawry of aggressive war and the best thinking of students of international relations with respect to the way power and security work in a world organized around the primacy of sovereign states, but newly afflicted with the rise of non-state actors... This book deserves the widest possible reading. - from the Foreword, Richard A. Falk, Professor Emeritus of International Law, Princeton University, USA