This unit was written by Dr Nigel Warburton
Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence
Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:
Berlin, I ‘Four Essays on Liberty?, 1969, Oxford University Press, by permission of Oxford University Press.
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