http://en.wikipedia.org/wiki/Petrodollar_warfare

and then do more search on the internet about how USA are basically forcing everybody to buy oil in $$.

At least russia doesnt force other nations to trade gaz in rubs.

So yeah,russia is evil , but USA are even more evil.

EDIT:

downvote me all you want it's not just a conspiracy theory,that's a fact,but since we are on a pro american board, i did not expect anything else but downvotes.

There is a reason why USA invaded Irak or Libya,and it had nothing to do with promoting democracry.

It was about the fear of USA seeing Iraki and Libyan leaders trade their oil in something else than dollars.

And when the world revolts against this made up,military backed dollar domination, USA will fail hard. Because the dollar is backed by nothing but fear.