The formation of attitudes and expectations in international politics—if they are to be adequate bases for action—must rest upon, among other things, a correct appraisal of the motives of the leaders of other countries and of the means by which they achieve their objectives. In a recent article in World Politics entitled “Science and Politics in the U.S.S.R.: The Genetics Debate,” Miss Pamela N. Wrinch discusses the possible ideological motives (as well as, speculatively, some of the psychological ones) which give impetus to the eradication of disapproved scientific theories and procedures, and the argumentative means employed in this stamping-out process. Though the article is fully convincing in presenting a clear picture of Soviet debating techniques, Miss Wrinch is less successful on the score of assessing the motives for the official opposition to certain theories in Soviet Russia.