Steinbeck's work remains popular in both the United States and Europe, chiefly for its social consciousness and concern and for the narrative qualities displayed in the early novels. Although he refused to settle into political conservatism (preferring to maintain traditions and resist change) in his later years, his all-embracing support of American values and acceptance of all national policies, including the Vietnam War (1955–75; conflict in which the United States fought against Communist North Vietnam when they invaded Democratic South Vietnam), lost him the respect of many liberal (preferring social change) intellectuals who had once admired his social commitments. He died on December 20, 1968, in New York City.
The last decades of his life were spent in New York City and Sag Harbor with his third wife, with whom he traveled widely. Later books include Sweet Thursday (1954), The Short Reign of Pippin IV: A Fabrication (1957), Once There Was a War (1958), The Winter of Our Discontent (1961), Travels with Charley in Search of America (1962), America and Americans (1966), and the posthumously published Journal of a Novel: The East of Eden Letters (1969), Viva Zapata! (1975), The Acts of King Arthur and His Noble Knights (1976), and Working Days: The Journals of The Grapes of Wrath (1989).