International Law and the Principle of Non-Intervention: History, Theory, and Interactions with Other PrinciplesÂsolves this enigma by exploring what constitutes an 'intervention' in international law and when interventions are unlawful. These questions are approached from three different perspectives, which are reflected in the book's structure: historical, theoretical, and systemic. Through a comprehensive survey of primary documents and of over 200 cases of intervention from the mid-18th century to the present day, as well as an extensive literature search, this work provides an in-depth analysis of the principle of non-intervention which links it to fundamental notions of international law, including sovereignty, use of force, self-determination, and human rights protection.