Henryk Grossman is a name most socialists or students of political and social theory - let alone the mass of working people around the world - have probably never heard of. Yet Grossman, a Polish Jew born in 1881, deserves recognition as the most sophisticated defender of Karl Marx's theory of capitalism's inevitable collapse. With capitalism sinking into its deepest ever crisis, Grossman's neglected work must be revisited and popularised. Is capitalism entering its final breakdown?