Germain Grisez was one of the great 'traditional' Catholic moral thinkers and writers of the twentieth century. His valiant battles in defence of Humanae vitae will undoubtedly be brought to our attention by other 'traditional' obituarists; and rightly. This 50th anniversary of that monumental encyclical must, as I said only a few days ago, be our occasion to revisit that document, to know it, to realise its importance in the current crisis facing the whole state of Christ's Church Militant here in Earth. Grisez, together with John Finnis (see below) have, of course, been forthright in their treatment of Amoris laetitia. Christian Moral Philosophy is a coherent interlocking system.
Call me a dreadful old cynic, but just possibly some of those other obituarists may slightly forget another ethical battle which Grisez fought, together with Boyle and Finnis. In their masterly Nuclear deterrence of 1988, Oxford University Press, they examined the fundamental building blocks of the 'Deterrence' doctrine which lay and lie at the basis of the policies of both America and her satellites, and, of course, also of the Russian Federation. In the light of the Church's teaching about the Just War, they concluded that these policies cannot be anything other than totally immoral.
This conclusion, of course, was the same as that of a great warrior for Christian Tradition and Ethics in the dark days of the 'Council', Cardinal Ottaviani.
(I sha'n't enable comments which disagree with this conclusion unless it is abundantly clear to me that a writer has carefully read and understood the book Nuclear Deterrence. It hardly seems respectful to the memory of someone as truly great as Grisez to write uninformed criticism of his work when he has just died. In any case, at most times I rather dislike attacks on traditional Christian ethics.)