Francisco de Vitoria (c. 1485-1546) is well-known for his philosophical contributions to natural rights and international law. However, his extensive work on the conflict between civil authority and the authority of the Catholic Church has been largely neglected by political theorists and intellectual historians. While scholars have recently recognized the significant role played by natural law in the history of political secularism, they have focused almost exclusively on the “modern” natural law theories of Hobbes, Pufendorf, and Thomasius, as opposed to (...) the “scholastic” natural law of early modern Thomists like Vitoria. This essay undertakes an analysis of Vitoria’s use of natural law theory in his approach to civil-ecclesiastical conflict. Contrary to critiques from the “modern” natural lawyers, it argues that Vitoria’s idea of natural law spearheads a forceful defence of the autonomy of civil power from ecclesiastical power. Based on his sharp distinction between the natural and the supernatural spheres of human life, Vitoria argues for a “dualist” position in which civil and ecclesiastical powers are independent and equally binding on human consciences. The essay acknowledges that Vitoria’s dualism ultimately gives way to his endorsement of papal supremacy over all Christian princes. However, this papalist conclusion does not follow from Vitoria’s natural law theory but rather from an opposing political principle: the notion of the universal Christian commonwealth. (shrink)

Contrary to the received understanding that Francisco de Vitoria and Francisco Suárez ruled out religious war by grounding just cause in natural law, they supported a robust view of papal authority for war when necessary for the defense of the church against heretics, schismatics, and pagans as well as for the spread of Christianity and Christendom throughout the world. They believed that religious wars were in accord with natural law as a means to its fulfillment in Christianity, as a justification (...) for the defense of the church as the one true faith, and as a moral obligation to provide all of humanity with the opportunity to receive Christian truth and grace. The neo‐Thomists' vigorous support for religious war was in the mainstream of the Christian just war tradition from the time of the wars against pagans in the early middle ages through their own time. This finding and the continuation into the modern era of sanctified patriotism stemming from the mixing of church and state especially during war that began in early Middle Ages, along with the historic roots of the recently prominent presumption against war, argue for a more complex understanding of the normative Christian just war tradition than that found among supporters of the classic interpretation of that tradition. (shrink)