This book presents a comprehensive study of the theoretical aspects of international politics providing illustrations from the foreign policies of India and other developing countries. The book defines the nature and scope of international law, different aspects of diplomacy, the role of collective security, and the working of international organisations such as the UNO. It has separate chapters on India s foreign policy, the Non-Aligned Movement and foreign policies of some major powers including the emerging global powers and economic superpowers like Germany and Japan. The book covers syllabi requirements for papers on international politics in most Indian universities and the prescribed syllabus for the IAS examination. It is, therefore, a useful textbook for university students and candidates for the IAS and other Public Service examinations.