 The School, in addition, made important contributions to areas such as trade and finance. Azpilcueta’s approach to inflation and his defense of the morality of exchange was a step toward a culture of accepted risk and profit. Vitoria’s argument that commerce fell within the ius gentium was not embraced by everyone in the School; but this argument had a direct influence on Grotius. Moreover, although a Protestant and an opponent of papal claims to temporal power, Grotius drew on Thomas Aquinas, Cajetan, and Vitoria to argue for the freedom of the seas and to develop a framework for international law. Because of the School’s role in the development of economic theory, some economists, including those belonging to the Austrian School of National Economy, refer to them as their ancestors.