The 5th edition of the work constitutes an enriched and revised record of the regulatory framework of modern international relations.

It addresses issues that form the core of international law, such as: the basic elements of the system (subjects and sources of international law, international treaties, etc.), its areas of application (territorial issues, law of the sea, new institutions), the international activities of states (diplomatic relations, succession, secession, international responsibility, protection of the environment and cultural heritage, etc.), the organization of the international community (United Nations, International Labour Organization), the management of international crises (peaceful settlement of disputes, contribution of the International Court of Justice at The Hague).

The book contains numerous examples of cases from modern history, explanatory maps for the law of the sea, and is accompanied by extensive bibliography and a detailed alphabetical index.

It is addressed to every scholar, researcher, or practitioner of international law and to every active citizen who wishes to explore the prevailing norms in modern international relations.