Meghnad Desai has published a book, Marx’s Revenge in which he poses a fundamental question for Marxists – could capitalism go on for ever? The short answer to this is that capitalism will last until such time as it is overthrown through socialist revolution, conscious action by millions of people. So the question needs to be reformulated: is socialism on the agenda? If capitalism is a flawed system, as we argue, then it will offer endless opportunities for its overthrow. Desai, on the other hand, seems to argue that a crisis-free future is possible for capitalism. Talk of socialism is therefore premature. Mick Brooks argues the case for socialism in the twenty-first century.