Two Concepts of Liberty

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"Two Concepts of Liberty" was the inaugural lecture delivered by the liberal philosopher Isaiah Berlin before the University of Oxford on 31 October 1958. It was subsequently published as a 57-page pamphlet by Oxford at the Clarendon Press. It also appears in the collection of Berlin's papers entitled Four Essays on Liberty (1969) and was reissued in a collection entitled Liberty: Incorporating Four Essays on Liberty (2002). The essay, with its analytical approach to the definition of political concepts, re-introduced the study of political philosophy to the methods of analytic philosophy. It is also one of Berlin's first expressions of his ethical ontology of value-pluralism. Berlin defined negative liberty (as the term "liberty" was used by Thomas Hobbes) as the absence of coercion or interference with agents' possible private actions, by an exterior social body. He also defined it as a comparatively recent political ideal, which re-emerged in the late 17th century, after its slow and...

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