What collection of papers by a Russian-British social and political theorist appeared in 1969?
Two Concepts of Liberty "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 more recently reissued in a collection entitled simply "Liberty" (2002).
An Essay on Liberation An Essay on Liberation is a 1969 book by the Frankfurt School philosopher Herbert Marcuse.