Niebuhr, Reinhold, 1892-1971. Man's nature and his communities : Essays on the dynamics and enigmas of man's personal and social existence / Reinhold Niebuhr. - New York : Charles Scribner's Sons, 1965. - 125 p. Includes bibliogr. references. Subjects--Topical Terms: Civilization.Human behavior.Social interaction. Dewey Class. No.: 302