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Vilfredo Federico Damaso ParetoGeoffrey Duncan Mitchell. A Hundred Years of Sociology. Transaction Publishers, 1968. p. 115. (; ; born Wilfried Fritz Pareto; 15 July 1848 – 19 August 1923) was an Italian polymath, whose areas of interest included sociology, civil engineering, economics, political science, and philosophy. He made several important contributions to economics, particularly in the study of income distribution and in the analysis of individuals' choices, and was one of the minds behind the Lausanne School of economics. He was also responsible for popularising the use of the term elite in social analysis and contributed to elite theory. He has been described as "one of the last Renaissance scholars. Trained in physics and mathematics, he became a polymath whose genius radiated into nearly all other major fields of knowledge."
He introduced the concept of Pareto efficiency and helped develop the field of microeconomics. He was also the first to claim that income follows a Pareto distribution, which is a power law probability distribution. The Pareto principle was named after him, and it was built on his observations that 80% of the wealth in Italy belonged to about 20% of the population. He also contributed to the fields of mathematics and sociology.
In his childhood, Pareto lived in a middle-class environment, receiving a high standard of education, attending the newly created Istituto Tecnico Leardi where Ferdinando Pio Rosellini was his mathematics professor. In 1869, he earned a doctorate in engineering from what is now the Polytechnic University of Turin, then known as the Technical School for Engineers, with a dissertation entitled "The Fundamental Principles of Equilibrium in Solid Bodies". His later interest in equilibrium analysis in economics and sociology can be traced back to this dissertation. Pareto was among the contributors to the Rome-based magazine La Ronda between 1919 and 1922.
Pareto's relationship with scientific sociology in the age of the foundation is grafted in a paradigmatic way at the moment in which he, starting from the political economy, criticizes positivism as a totalizing and metaphysical system devoid of a rigorous logical-experimental method. In this sense we can read the fate of the Paretian production within a history of the social sciences that continues to show its peculiarity and interest for its contributions in the 21st century.Giovanni Busino, Sugli studi paretiani all'alba del XXI secolo in Omaggio a Vilfredo Pareto, Numero monografico in memoria di Giorgio Sola a cura di Stefano Monti Bragadin, "Storia Politica Società", Quaderni di Scienze Umane, anno IX, n. 15, giugno-dicembre 2009, p. 1 e sg. The story of Pareto is also part of the multidisciplinary research of a scientific model that privileges sociology as a critique of cumulative models of knowledge as well as a discipline tending to the affirmation of relational models of science.Guglielmo Rinzivillo, Vilfredo Pareto e i modelli interdisciplinari nella scienza, "Sociologia", A. XXIX, n. 1, New Series, 1995, pp. 2017–2222Guglielmo Rinzivillo, Una epistemologia senza storia, Rome, New Culture, 2013, pp. 13–29,
Pareto might have turned to sociology for an understanding of why his mathematical economic theories did not always predict actions of individuals in practice, in the belief that unforeseen or uncontrollable social factors intervened. His sociology holds that much social action is nonlogical and that much personal action is designed to give spurious logicality to non-rational actions. We are driven, he taught, by certain "residues" and by "derivations" from these residues. The more important of these have to do with conservatism and risk-taking, and human history is the story of the alternate dominance of these sentiments in the ruling elite, which comes into power strong in conservatism but gradually changes over to the philosophy of the "foxes" or speculators. A catastrophe results, with a return to conservatism; the "lion" mentality follows. This cycle might be broken by the use of force, says Pareto, but the elite becomes weak and humanitarian and shrinks from violence.Aron, Raymond. (1967) Main Currents in Sociological Thought: Durkheim, Pareto, Weber – Vol. 2 online edition ; excerpt and text search
Among those who introduced Pareto's sociology to the United States were George C. Homans and Lawrence Joseph Henderson at Harvard, and Paretian ideas gained considerable influence, especially on Harvard sociologist Talcott Parsons, who developed a systems approach to society and economics that argues the status quo is usually functional.Homans, George C., and Charles P. Curtis Jr. (1934) An Introduction to Pareto: His Sociology . Alfred A. Knopf. New York. The American historian Bernard DeVoto played an important role in introducing Pareto's ideas to these Cambridge intellectuals and other Americans in the 1930s. Wallace Stegner, in his biography of DeVoto, recounts these developments and says this about the often misunderstood distinction between "residues" and "derivations". He wrote: "Basic to Pareto's method is the analysis of society through its non-rational 'residues,' which are persistent and unquestioned social habits, beliefs, and assumptions, and its 'derivations,' which are the explanations, justifications, and rationalizations we make of them. One of the commonest errors of social thinkers is to assume rationality and logic in social attitudes and structures; another is to confuse residues and derivations."Wallace Stegner, The Uneasy Chair: A Biography of Bernard DeVoto (Garden City, NY: Doubleday, 1974), p. 141.
As a young student, Mussolini had attended some of Pareto's lectures at the University of Lausanne in 1904. It has been argued that Mussolini's move away from socialism towards a form of elitism may be attributed to Pareto's ideas. (2025). 9781137534866, Palgrave Macmillan. ISBN 9781137534866 Franz Borkenau, a biographer, argued that Mussolini followed Pareto's policy ideas during the beginning of his tenure as prime minister. Karl Popper dubbed Pareto the "theoretician of totalitarianism";Mandelbrot, Benoit; Richard L Hudson (2004). The (mis)behavior of markets : a fractal view of risk, ruin, and reward. New York: Basic Books. pp. 152–155. . according to Cirillo, there is no evidence in Popper's published work that he read Pareto in any detail before repeating what was then a common but dubious judgement in anti-fascist circles.
Pareto was the first to realize that cardinal utility could be dispensed with, and economic equilibrium thought of in terms of ordinal utility, that is, it was not necessary to know how much a person valued this or that, only that he preferred X of this to Y of that. Utility was a preference-ordering. With this, Pareto not only inaugurated modern microeconomics but he also attacked the alliance of economics and utilitarian philosophy, which calls for the greatest good for the greatest number; Pareto said good cannot be measured. He replaced it with the notion of Pareto-optimality, the idea that a system is enjoying maximum economic satisfaction when no one can be made better off without making someone else worse off. Pareto optimality is widely used in welfare economics and game theory. A standard theorem is that a perfectly competitive market creates distributions of wealth that are Pareto optimal.
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