Abstract
While a superb scholarship on Morgenthau as a political theorist has literally exploded over the past ten years, his analysis of foreign policy has been generally neglected, overlooking the intimate relationship between theory and policy in his practical philosophy. This article presents Morgenthau's public opposition to the Vietnam War by placing it in the broader framework of his theoretical work. In doing so, I illustrate and clarify the meaning of three theses that are at the very centre of his political reflection: the critique to any type of universalistic understanding of world politics; his claim about the intangible roots and social bases of political order; and, finally, the dangers of the ‘military displacement of politics’. Writing about Morgenthau's critique of American intervention in Vietnam today is neither a purely academic exercise, nor a mere historical reconstruction of a great scholar's position on one of the most important military conflicts of the twentieth century. In fact, this article aims to shed light on some intellectual categories which seem to be useful in order to understand current political phenomena, and to criticise philosophies and faulty modes of thought that still enjoy a predominant but unjustified political status.