Berlin (http://en.wikipedia.org/wiki/Isaiah_Berlin) was a colossus of a thinker bestriding the twentieth century. His unique intellectual contribution was the concept of value-pluralism. Allow the mellifluous tones of John Gray to give you a tour round Berlin’s mind, and in particular his ideas about agonistic liberalism.
240 pages in Princeton University Press paperback edition.
ISBN 978-0691157429