The book provides new vistas on Karl Marx's political economy, philosophy and politics on the occasion of his 200th birthday. Often using hitherto unknown material from the recently published Marx- Engels Gesamtausgabe (the MEGA2 edition), the contributions throw new light on Marx's works and activities, the sources he used and the discussions he had, correcting received opinions on his doctrines. The themes dealt with include Marx's concepts of alienation and commodity fetishism, the labour theory of value and the theory of exploitation, Marx's studies of capital accumulation and economic growth and his analysis of economic crises and of the labour contract. Novel developments in the reception of his works in France and the UK conclude the volume. This book was originally published as a special issue of The European Journal of the History of Economic Thought.