Consider that the driving voices behind the formation of both the UN and the IMF–Alger Hiss and Harry Dexter White–were Soviet agents. If you look at what the IMF actually does, it does not sponsor capitalism at all. It sponsors New Deal sorts of public works projects, that undermine existing businesses, disproportionately line the pockets of elites, and leave trails of debt that are never repaid.
Patently, the goal was a world filled with dictators who met at the UN to determine the fate of the rest of us, after dispensing with the US through currency devaluations that were utterly out of the control of Congress.
Here is my piece on what the Fed and IMF need to go: http://moderatesunited.blogspot.com/2010/05/going-out-today.html
HOW is a topic dealt with there as well.