The dissertation considers the difficulties prompted in International Law by the emergence of a unique form of governance which is deemed acceptable among Nations: democracy. This led to study the legal issues pertaining to the rights of non-democratic States, the power of their governements and their relations with democratic States (incl. diplomatic relations, conventional relations, criminal law relations, conflict of laws relations, economic relations and relations within the framework of international organisations). The question of the international responsibility of non-democratic States (including that of the sanctions) is also considered.