Is anyone actually ruling the world?
It can't be the US government or American financial corporations nowadays. They may have done so to some extent in the past but not now.
Maybe the mainland Chinese are going to be the big financial movers and shakers in the near future. The US people owe them billions.
As for the religious of this world, they can't be underestimated. They and the financial bully boys are responsible for much of the poverty caused by human overpopulation in this world. Do we need Satan to help us make a mess of this world? I think we can do quite well on our own.
Mind you holy roller nutcases do play their part in making the world less liveable for some. Look at the Middle East. Look at Afghanistan and the Taliban. Look at how well the KKK (they call themselves a protestant Christian movement) have done at certain times in USA history.