In the history of science it has often happened that a scholar's ideas are denied full recognition because of that scholar's real or assumed connection to some controversial ideology. The position accorded to Vilfredo Pareto is one illustration of such practice in present-day sociology. This scholar is often said to have been a "Newton of the Moral World," or altogether a fascist ideologist. So Faris informs us that "The book [The Mind and Society] formulates the implicit philosophy of Italian Fascism, advocating the right of the strong to take what they want without apology or appeal to moral principles." In tracing the development of social thought, Bogardus devotes an entire chapter to "Pareto and Fascist Thought," and authoritatively argues that "While fascism has some of its roots in Nietzsche's concepts and other roots in Machiavellianism, yet Pareto's ideas come even closer to giving an adequate basis." Zanden, in turn, interprets Pareto's sociology to be "a philosophy of society, a social creed, determined mainly by violent and ever purely personal passions. The logical fulfillment of this political manifesto is fascism." We need not continue further; analogous affirmations are bountiful in the literature. To be sure, not all sociologists accept this view, but to date little or no systematic effort has been made to resolve the controversy, with the result that many students of sociology are unwitting victims of one of the most cruel intellectual hoaxes perpetrated against their discipline and one of their kind. The present paper proposes to offer a clarification with respect to the alleged connection between Pareto's sociology and fascist ideology. Our approach takes us in two major directions: first, an examination of Pareto's Treatise, his chief sociological work, and second, an examination of a series of letters written to his great friend Pantaleoni during the period when fascism was a political reality in Italy. Before proceeding to present our argument, it may be useful to inquire briefly about the meaning of "fascism," as his critics tend to use that word. A rapid glance at the literature reveals that the following are generally believed to be among the chief characteristics of fascist ideology: distrust of reason, a code of behavior based on "race" and violence, belligerent nationalism, government by an elite, and totalitarianism. Characteristically, these then provide the basis for accusing Pareto of "antirationalism," "anti-intellectualism," "contempt for democracy," and approval of the use of force at all costs. The major portion of this paper will be concerned, therefore, with explicating Pareto's position on these four issues. We shall begin by considering Pareto's alleged antirationalism. [ABSTRACT FROM AUTHOR]