Published online open access in Law and History Review: The Law of Nations in the Diplomacy of the American Revolution by Benjamin C. Lyons.
Historians have long known that leaders of the American Revolution looked to the law of nations for insight into the rights and obligations of independent states. In so doing, Americans relied largely on the writings of European legal theorists, such as Hugo Grotius and Emerich de Vattel, whose treatises on the law of nations are regarded today as having laid the foundations of international law. As this article demonstrates, however, early modern statesmen did not base their conduct on such treatises, but on a customary law of nations that they derived from precedent and the text of earlier treaties. This article elucidates the distinction between the customary and theoretical branches of the law of nations. It then goes on to examine the law of nations’ impact on revolutionary-era diplomacy, drawing particular attention to a series of wartime negotiations over rights to the Mississippi River. As the article shows, most American emissaries lacked experience with the customary laws of diplomacy and struggled to use that law effectively in their negotiations. The most serious consequences were averted due in part to French legal advice, and because one American, John Jay, acquired enough competence in customary law to guide his colleagues toward an effective negotiation of peace.
--Dan Ernst
