Interesting article on Marxism at the Economist.
Here is the conclusion:
Anti-globalism has been aptly described as a secular religion. So is Marxism: a creed complete with prophet, sacred texts and the promise of a heaven shrouded in mystery. Marx was not a scientist, as he claimed. He founded a faith. The economic and political systems he inspired are dead or dying. But his religion is a broad church, and lives on.