Pareto was born of an exiled noble Genoese family in 1848 in Paris, the centre of the popular revolutions of that year. His father, Raffaele Pareto (1812–1882), was an Italian civil engineer and Ligurian marquis who had left Italy much like Giuseppe Mazzini and other Italian nationalists. His mother, Marie Metenier, was a French woman. Enthusiastic about the 1848 German revolution, his parents named him Fritz Wilfried, which became Vilfredo Federico upon his family's move back to Italy in 1858. In his childhood, Pareto lived in a middle-class environment, receiving a high standard of education, attending the new created Istituto Tecnico Leardi where Fernando Pio Rosellini was his mathematics professor. In 1869, he earned a doctor's degree in engineering from what is now the Polytechnic University of Turin (then the Technical School for Engineers). His dissertation was 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 paper.
From civil engineer to classical liberal economist
For some years after graduation, he worked as a civil engineer, first for the state-owned Italian Railway Company and later in private industry. He was manager of the Iron Works of San Giovanni Valdarno and later general manager of Italian Iron Works.
He did not begin serious work in economics until his mid-forties. He started his career a fiery advocate of classical liberalism, besting the most ardent British liberals with his attacks on any form of government intervention in the free market. In 1886, he became a lecturer on economics and management at the University of Florence. His stay in Florence was marked by political activity, much of it fueled by his own frustrations with government regulators. In 1889, after the death of his parents, Pareto changed his lifestyle, quitting his job and marrying a Russian, Alessandrina Bakunina. She left him in 1902 for a young servant.
Economics and sociology
In 1893, he succeeded Léon Walras to the chair of Political Economy at the University of Lausanne in Switzerland where he remained for the rest of his life. In 1906, he made the famous observation that twenty percent of the population owned eighty percent of the property in Italy, later generalised by Joseph M. Juran into the Pareto principle (also termed the 80–20 rule). In one of his books published in 1909 he showed the Pareto distribution of how wealth is distributed, he believed "through any human society, in any age, or country". He maintained cordial personal relationships with individual socialists, but always thought their economic ideas were severely flawed. He later became suspicious of their humanitarian motives and denounced socialist leaders as an 'aristocracy of brigands' who threatened to despoil the country and criticized the government of Giovanni Giolitti for not taking a tougher stance against worker strikes. Growing unrest among labor in Italy led him to the anti-socialist and anti-democratic camp. His attitude toward fascism in his last years is a matter of controversy.
Pareto's relationship with scientific sociology in the age of the foundation is grafted in a paradigmatic way in 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. 2017–222 see also in Guglielmo Rinzivillo, Una epistemologia senza storia, Rome, New Culture, 2013, pp. 13–29, ISBN 978-88-6812-222-5).
In 1923 Pareto remarried with Jeanne Regis, just before he died in Geneva, Switzerland, 19 August 1923, "among a menagerie of cats that he and his French lover kept" in their villa; "the local divorce laws prevented him from divorcing his wife and remarrying until just a few months prior to his death".