Mehnert returned to Germany after the war. In 1946, an American tribunal cleared him of having Nazi affiliations. He continued to face occasional accusations in the American press of spying and anti-Semitism. The German historian Norbert Frei describes Mehnert as "one of the adaptable 'former ones'" in the postwar leadership of the German newspaper Christ und Welt. Mehnert held various positions as journalist, editor, and professor. He became a foreign commentator for South German Radio in 1950. He was a professor of political science at Aachen Institute of Technology. He was the editor of the journal Osteuropa. He was a government advisor on Sino-Russian matters (counseling German chancellors from Konrad Adenauer to Helmut Schmidt). He published several books on political science. In the late 1970s he authored several books on youth movements in Western countries. He died in 1984 at age 77 in Freudenstadt, West Germany. Since 2005, the "Europainstitut Klaus Mehnert" has offered a student exchange program between his former university RWTH Aachen and the University of Kaliningrad. Selected writings in German (some translated) Ein deutscher Austauschstudent in Kalifornien ("A German exchange student in California"). Stuttgart, 1930 Die Jugend in Sowjet-Russland. Berlin, 1932; Youth in Soviet Russia. Transl. by Michael Davidson, Westport, Conn., 1981 The Russians in Hawaii, 1804-19. Hawaii, 1939 Der Sowjetmensch. Stuttgart, 1958; The Anatomy of Soviet man. Transl. by Maurice Rosenbaum, London, 1961 Peking und Moskau. Stuttgart, 1962; Peking and Moscow. Transl. by Leila Vennewitz, London, 1963 China nach dem Sturm. Munich, 1971; China today. Transl. by Cornelia Schaeffer, London, 1972. China Returns. New York, 1972. in English Stalin Versus Marx: The Stalinist Historical Doctrine. London: George Allen and Unwin, 1952. 130 p. Soviet Man and His World. New York: Frederick A. Praeger, 1958. Peking and Moscow. New York: G. P. Putnam's Sons, 1963. 522 p. China Today. London: Thames and Hudson, 1972. 322 p. . China Returns. New York: Dutton, 1972. 322 p. . Moscow and the New Left. Berkeley & Los Angeles: University of California Press, 1975. 275 p. . Twilight of the Young: The Radical Movements of the 1960s and Their Legacy. New York, 1977. 428 p. Youth in Soviet Russia. Hyperion Press, 1981. . The Russians & Their Favorite Books. Stanford, CA: Hoover Institution Press, 1983. . in German Peking und Moskau. DTV, 1964. 508 p. Der deutsche Standort. Stuttgart: Deutsche Verlags-Anstalt, 1967. 415 p. China nach dem Sturm. 1971. Stuttgart: Deutsche