French sociologist, born at Sarlat (Dordogne) in 1843. Entering the legal profession, he was for some time a juge dinstruction in his native town, becoming afterwards head of the statistical department of the ministry of justice. He also held the professorship of modern philosophy at the Collège de France in Paris, and was elected a member of the Académie des sciences morales et politiques in 1900. Attracted to the study of criminology by the opportunities of his profession, he gradually built up for himself a reputation as an acute observer of the phenomena of the subject, while at the same time he made striking and original deductions of his own. Special reference may be made to his theory of imitation as outlined in Les Lois de limitation (1890), and further elaborated in Logique sociale (1895). He also wrote LOpinion et la foule (1901); Les Transformations du droit (1894); Les Transformations du pouvoir (1899); LOpposition universelle (1897) and Psychologie économique (1902; Eng. trans., Social Laws, 1899). He died in Paris in 1904.
See bibliography of the sociological writings of Tarde in M. M. Davis, Psychological Interpretations of Society (Columbia University Press, 1909); also A. Matagrin, La Psychologie sociale de Gabriel Tarde (Paris, 1910).