Instructor modern European history and literature, 1939-1942. European representative Library of Congress Mission, 1946-1947. Executive secretary and research director international studies project, 1947-1953.
Acting professor sociology Stanford, 1951-1953. Visiting professor sociology Columbia, 1951. Professor sociology Massachusetts Institute Technology, 1953-1978, Ford professor sociology and international communications, 1958-1978, chairman political and social science department, 1963-1964.
Director Institut de Recherches Sociales, Paris, France, 1955-1965. Visiting professor U. Paris (Sorbonne).
Author: Psychological Warfare Against Nazi Germany, 1949. Propaganda in War and Crisis, 1951. (with H.D. Lasswell) The Policy Sciences, 1951.
The Nazi Elite, 1951. (with Raymond Aron) LaQuerrelle de la Committee for Economic Development, 1956. France Defeats E.D.C., 1957.
The Passing of Traditional Society, 1958. The Human Meaning of the Social Sciences, 1959. Evidence and Inference, 1960.
Quantity and Quality, 1961. Parts and Wholes, 1963. Cause and Effect, 1965.
(with H.D. Lasswell) World Revolutionary Elites, 1965. (with Wilbur Schramm) Communication and Change in the Developing Countries, 1967. (with Morton Gorden) Euratlantica.
Changing Perspectives of The European Elites, 1969. (with Wilbur Schramm) Communications and Change: The Last Ten Years-and the Next, 1976. Values and Development: Appraising Asian Experience, 1976.
(with L.M. Nelson) Communication Research-A Half-Century Appraisal, 1977. (with Harold D. Lasswell and Hans Speier) Propaganda and Communication in World History, 3 vols., 1979. Editor: Massachusetts Institute of Technology Studies in Comparative Politics, 1965-1975.
Served to captain Army of the United States, 1942-1946. Fellow Conference Science, Philosophy and Religion. Member International Society Political Psychology (a founder), American Sociological Society, Society for Psychological Study Social Issues (life), American Political Science Association, World, American associations public opinion research, American Psychological Association.