"Marxist theoreticians have heard too much, in season and out of season, about 'the crisis of Marxism' to be unduly moved by the latest anti-Marxist challenge, particularly as it coincided, oddly enough, with the practical confirmation of the essential theses of Karl Marx in the economic crash of 1929-36. In writing this book it was certainly not our intention to rebut the old stale arguments once again with old and equally stale answers. The same well-worn gramophone record has given satisfaction since the end of the last century."