Abstract: Liberty is the new and expanded edition of Isaiah Berlin's Four Essays on Liberty, a modern classic of liberalism. These essays, of which the best known is ‘Two Concepts of Liberty’, do not offer a systematic account of liberalism, but instead deploy a view of being, knowledge, and value which was calculated by Berlin to rule totalitarian thinking out of court. The new edition adds to the four, ‘From Hope and Fear set free’, which reinforces Berlin's argument and which he wanted to include in the original edition. Three further essays, and three autobiographical appendices have been included, so that all Berlin's principal statements on liberty are gathered together. The whole is introduced by Berlin's editor, Henry Hardy.

Keywords: Isaiah Berlin, Four Essays on Liberty, Henry Hardy, knowledge, liberalism, liberty, totalitarianism, Two Concepts of Liberty, value