ABSTRACT
This chapter examines what Pareto said concerning each of the individual differences which align to form his psychological model. It discusses the idea that psychoanalytic theories of negativism and theories of Machiavellianism-Psychopathy can be blended to provide a better understanding of Pareto's fox'. It is clear from Pareto's references in his Treatise' to the class IV and class V residues that some kind of individual difference involving individualism and collectivism also integrates within his psychological model. Pareto's listing of the various sub-categories of the residues of sociality' immediately asks us to accept that altruistic behaviour relates more closely to conservative than to liberal personality. Finally, some degree of psychological coherence is becoming apparent in Pareto's insistence that the conservative class II residues tend to correlate with the class IV residues of sociality.
