You would have never heard of Karl Marx had it not been for V.I. Lenin. Marx was neither terribly successful nor terribly important in his own right, and had it not been for a revolution carried out three decades after his death, he would be a footnote at best. But on this May Day, the high holy day of Communism and Socialism, it is important that we remember. As a student, both in England and America, I often heard the refrain -- even from conservatives -- that "communism wouldn't have been so bad if it had been carried out...