 One of the generally acknowledged merits of the School of Salamanca was the revival of natural law or at least its Thomist version. This was more or less closely connected to commentaries on the second part of Thomas Aquinas’ Summa theologiae. Vitoria’s lectures on the quaestiones 90–105 of the Prima secundae, entitled De lege, dealing with the different kinds of law, and his voluminous commentary on the Secunda secundae are now available in critical editions by Vicente Beltrán de Heredia. Molina described his monumental De iustitia et iure, which in current forms of printing would take up around 6,000 pages, as a commentary on quaestiones 57–79 in the Secunda secundae of the Summa theologiae, but he admitted that he was not following Thomas precisely and that his theory covered a wider range compared to what had been discussed by “Divus Thomas”. Whether the ten volumes of Suárez’s De legibus ac Deo legislatore are primarily to be seen as a commentary on quaestiones 90–108 of the Prima secundae is still debated by modern scholars. Soto, who is mentioned by Suárez as one of his main sources besides Thomas Aquinas, commented on questions from both the Prima secundae and Secunda secundae in the ten books of his extremely influential treatise De iustitia et iure. The common background for all the authors of the School of Salamanca, as well as their Jesuit successors, who dealt with law, natural law, and justice was, therefore, Thomas Aquinas’s division of the different kinds of law in the Prima secundae and his reflections on the different meanings of justice, law, and right from the Secunda secundae, whether they followed him or not.