I find myself in a difficult situation, beleaguered on all sides. According to Finnis, Aquinas derived a doctrine of natural rights from his teaching on natural law. According to Kries, echoing Fr. Fortin, the two ideas, natural rights and natural law, are radically opposed to one another. This leaves me with a hope that some readers, faced by these extremely opposed assertions, may find a note of sweet reasonableness, a sort of golden mean, in my own position, namely that Aquinas did not himself articulate a doctrine of natural rights, but that this doctrine was not inconsistent with his teaching on natural law. The two doctrines could coexist, as they did in some later neoscholastic writings.
Let us consider first the criticisms of Finnis. My own position was set out succinctly in a previous work. “When Aquinas was writing unreflectively and following the common practice of his age, he did use the word ius in a subjective sense in phrases like ius dominii. … Yet it remains true that he developed no explicit doctrine of subjective rights or natural rights.” This still seems to me a correct judgment. Moreover it corresponds quite closely to Finnis's reading of Aquinas in his earlier book.