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By analysing the history of the Law and Society movement, the article seeks to account for the peculiar forms of American sociology of law and for its failure to forge a new law school curriculum. Relying on the abundant literature available on this point, the article attempts to fit this history into the broader framework of cooperation between law and the social sciences. The analysis of the uneven success of the various course offerings in interdisciplinary science since the 1930s (Legal realism, law and economics, law and society association) allow us to question under what conditions non-legal knowledge might assume a lasting place in law schools.