Norman Geras's work on the subject of Karl Marx's antisemitism involved significant dissent from the Marxist tradition in which he located himself, precisely because unvarnished honesty prevented him from glossing over the many troubling ideas and notions that, simply, are there. His Normblog demonstrated how Geras, as a Marxist, took on the shibboleths of the postmodern left, and in particular the relativism whose malign influence he had noted when writing his book on Marx's conception of human nature. 'The principle of self-emancipation', wrote Geras in 1971, 'is central, not incidental, to historical materialism.' This book shows how the materialist usage of 'powers of human nature', 'natural desires', 'natural character' play an important role in the formulation of Marx's theory of history. It explores Richard Rorty's various usages on the question of human nature and the tensions and anomalies as well as then theses on utopia. The book also reviews a fast-growing sector of the current literature on Karl Marx, i.e. whether Marx condemn capitalism in the light of any principle of justice, and the controversy that has fuelled its growth, and distinguishes three meanings (personal, intellectual and socio-political) of 'being a Marxist'. It discusses the significance of the Euston Manifesto, antisemitism on the left anti-Jewish stereotypes, and Marxism before the Holocaust. The book concludes with insights into the 9/11 incident, the principle of humanitarian intervention and international law for military intervention.