This is the first English-language intellectual biography of the German-Jewish philosopher Ernst Cassirer (1874-1945), a leading figure on the Weimar intellectual scene and one of the last and finest representatives of the liberal-idealist tradition. Edward Skidelsky traces the development of Cassirer's thought in its historical and intellectual setting. He presents Cassirer, the author of The Philosophy of Symbolic Forms, as a defender of the liberal ideal of culture in an increasingly fragmented world, and as someone who grappled with the opposing forces of scientific positivism and romantic.