This book defines the right of self-defence as understood in and before 1945 and offers a possible better alternative for interpreting the significance of the precondition provided for in the Article 51 of the United Nations Charter.

Tadashi Mori, Ph.D. (2008), the University of Tokyo, Japan, is Professor of International Law at that university. He has published many articles on the right of self-defence in international law and has received awards including Japan Academy Medal.