The Law of Nations: Principles of the Law of Nature, Applied to the Conduct and Affairs of Nations and Sovereigns by M. D. Vattel
In this work, Emer de Vattel brings together natural law philosophy and the practical realities of statecraft, offering a systematic account of the rights and duties of nations as moral persons existing within a society of states. First published in 1758 and issued in numerous English editions thereafter, The Law of Nations stands as one of the foundational texts of modern international law. The 1829 English edition reflects the enduring relevance of his arguments at a moment when Europe and the Atlantic world were grappling with questions of sovereignty, war, neutrality, commerce, and diplomacy in the aftermath of revolution and empire. Vattel’s central premise is that nations, like individuals, are bound by principles of justice derived from reason and nature, yet must apply those principles prudently in light of political necessity.