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In page Max Horkheimer:

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Horkheimer intellectually reoriented the institute, proposing a programme of collective research aimed at specific social groups (specifically the working class) that would highlight the problem of the relationship of history and reason. The Institute focused on integrating the views of Karl Marx and Sigmund Freud. The Frankfurt School attempted this by systematically hitching together the different conceptual structures of historical materialism and psychoanalysis.[citation needed]