In this epoch of instability, crisis, war and ever-growing inequality, Marxism is becoming an increasingly attractive proposition to millions of workers and young people around the world. The old mole of revolution, to use Karl Marx's own phrase, is burrowing deep into the foundations of society. And yet we are repeatedly told that Marxism is either irrelevant, or out-dated, or even dead. Yet, if that were true, why are so many books and articles...