Henri Tajfel

Henri Tajfel was born Hersz Mordche Tajfel on 22 June 1919 in Poland. Because of the Polish numerus clausus laws restricting Jewish admission to universities, he left for the Sorbonne in Paris to study chemistry. When the Second World War broke out he volunteered for the French army, and within a year was a German prisoner of war. He had to make a decision that defined the rest of his life: whether to admit to his captors that he was a Polish Jew. He declared himself a French citizen but did not deny his Jewish identity, reasoning that denial discovered later would mean certain death. He survived through a sequence of POW camps. On returning home he discovered that almost none of his immediate family and few of his close friends had survived the Nazi Holocaust. The shock of this discovery was the explicit origin of his lifelong work on the psychology of prejudice and intergroup relations.

After the war Tajfel worked for the OSE (Œuvre de secours aux enfants), a Jewish humanitarian organization, resettling orphaned Jewish children, and for the United Nations International Refugee Organization. He always called the OSE work the most important achievement of his life and kept in touch with many of the children. He was granted French citizenship in 1946, met his future wife Ann (Anna-Sophie Eber), a German-born Briton, and moved to Britain, where he became a British citizen and they raised two sons. In 1951, at age 32, he began studying psychology at Birkbeck College, University of London, winning a competitive mature-student scholarship with an essay on prejudice. He graduated in 1954, lectured at Durham and then Oxford, and in 1962 was made a Founding Fellow of Linacre College, Oxford. In 1967 he was appointed Chair of Social Psychology at the University of Bristol, where he co-founded the European Association of Experimental Social Psychology and turned Bristol into a leading European center for the discipline.

His early experimental work attacked the prevailing assumption that extreme prejudice was a product of an authoritarian personality. "Nazism would not have been successful without the support of ordinary Germans," he insisted, and set out to locate the roots of prejudice in ordinary processes of thinking. His 1959 line-length judgment experiment showed that simply labeling stimuli with category labels (A versus B) caused observers to assimilate within categories and contrast between them — the accentuation effect of categorization. His 1969 paper Cognitive Aspects of Prejudice consolidated this position and won the first Gordon Allport Intergroup Relations Prize. The implication was profound: stereotyping was not the disease of a few authoritarian souls but a side-effect of how ordinary minds carve up the social world.

The 1971 minimal-group experiments are a touchstone of twentieth-century social psychology. Participants were assigned to two groups on completely trivial bases — preference for Klee versus Kandinsky paintings, the toss of a coin — without knowing each other and without any expected future interaction. Even so, in resource-allocation tasks they favored their in-group, even at the cost of maximum joint payoff, to maximize the relative difference. Mere categorization was sufficient to generate in-group favoritism. With his student John Turner, Tajfel then developed social identity theory: people have a built-in tendency to categorize themselves into groups, derive part of their self-concept from those memberships, and seek positive distinctiveness for the in-group as a route to self-esteem. The theory had enormous impact on group dynamics, intergroup relations, prejudice research, and organizational psychology, and helped distinguish a distinctly European social psychology from American individualist traditions. He died of cancer on 3 May 1982, age 62.

In 2018-19 documentation emerged that for years Tajfel had directed unwanted sexual attention toward female members of his Bristol lab, and that he himself had been uninterested in applying social identity theory to gender. The juxtaposition is among the field's most difficult historical reckonings. The European Association of Social Psychology consequently renamed the prestigious award that had borne his name. That the man who built a science of prejudice out of the Holocaust also reproduced a different power-based prejudice inside his own laboratory has driven a steady critical re-reading of social identity theory and a more general conversation about laboratory governance. Successor work by Turner and Penny Oakes developed self-categorization theory, extending Tajfel's framework into the cognitive processes by which people activate one identity rather than another in a given context, while a different lineage running through Marilynn Brewer, Michael Hogg, and Jolanda Jetten took social identity into health, organizational, and political behavior. Posthumous tributes in Social Groups and Identities and a long string of replications across cultures established the robustness of the minimal-group effect itself, even as critics raised the question of how much absolute discrimination, as opposed to mere in-group favoritism, was actually produced. His scientific contribution remains foundational; the human record requires the qualifications.