The meaning of poetry and the sociological and political significance of art are dealt with in these letters. Jacques Maritain (18 November 1882¿28 April 1973) was a French Catholic philosopher. Raised as a Protestant, he converted to Catholicism in 1906. An author of more than 60 books, he is responsible for reviving St. Thomas Aquinas for modern times and is a prominent drafter of the Universal Declaration of Human Rights. Pope Paul VI presented his "Message to Men of Thought and of Science" at the close of Vatican II to Maritain, his long-time friend and mentor. Jean Maurice Eugène Clément Cocteau (5 July 1889 ¿ 11 October 1963) was a French poet, novelist, dramatist, designer, boxing manager, playwright, artist and filmmaker. Along with other Surrealists of his generation (Jean Anouilh and René Char for example) Cocteau grappled with the "algebra" of verbal codes old and new, mise en scène language and technologies of modernism to create a paradox: a classical avant-garde. His circle of associates, friends and lovers included Pablo Picasso, Jean Marais, Henri Bernstein, Édith Piaf, whom he cast in one of his one act plays entitled Le Bel Indifferent in 1940, and Raymond Radiguet.