James A. Sadowsky, S.J., S.T.L. (1923–2012) was professor emeritus of philosophy at Fordham University, where he began teaching in 1960. A convert to Roman Catholicism from Anglicanism (1939) and ordained as a priest of the Society of Jesus (1957), he was a friend of Murray Rothbard's since the early 1960s and a Rothbardian in political philosophy and economics. Rothbard endorsed Sadowsky’s definition of rights (as formulated in the latter's 1966 article, "Private Property and Collective Ownership," which Rothbard cites in his The Ethics of Liberty (1982).
Ludwig von Mises: "Liberalism, which demands full freedom of the economy, seeks to dissolve the difficulties that the diversity of political arrangements pits against the development of trade by separating the economy from the state. It strives for the greatest possible unification of law, in the last analysis for world unity of law. But it does not believe that to reach this goal, great empires or even a world empire must be created." - Nation, State, and Economy