Why do Shakespeare's wise readers do conclude that liberalism was invented by the Devil (as Dr Johnson); or that capitalism goes to Hell (as K. Marx), as an old man dreaming of his young years?
Best using of Karl Marx in 2011 is of course not in economic receipts. Economists are monkeys in K. Marx opinion. There is no more religious matter than 'economy', in the satanic meaning that Marx or Shakespeare gives to religion, and Egyptian 'natural law' that is today the ground of USA under-culture for kids (You can doubt that there is any adult in the USA, when you see the bizarre Obama couple on TV-shows and their German sexual exhibitionism.)
Best using of Karl Marx in 2011 is to understand Shakespeare's Tragedy of Last Judgment. And this is not nothing to understand Shakespeare; because he knew the destiny of European civilization, that God don't bless.