Economic Collapse Blog has had a series of really good articles lately.

The latest one, titled: Saudi Arabia And China Team Up To Build A Gigantic New Oil Refinery - Is This The Beginning Of The End For The Petrodollar? really does a fantastic job of retelling the history of the "petrodollar"

Here's a couple article excerpts:

Over the past several years, China has sought to aggressively expand trade with Saudi Arabia, and China now actually imports more oil from Saudi Arabia than the United States does. In February, China imported 1.39 million barrels of oil per day from Saudi Arabia. That was 39 percent higher than last February. So why is this important? Well, back in 1973 the United States and Saudi Arabia agreed that all oil sold by Saudi Arabia would be denominated in U.S. dollars. This petrodollar system was adopted by almost the entire world and it has had great benefits for the U.S. economy. But if China becomes Saudi Arabia's most important trading partner, then why should Saudi Arabia continue to only sell oil in U.S. dollars? And if the petrodollar system collapses, what is that going to mean for the U.S. economy?

It will not happen overnight, but as the U.S. economy continues to get weaker it is inevitable that the rest of the world will continue to question why the U.S. dollar should automatically have such a dominant position in international trade.

Over the next few years, keep a close eye on Saudi Arabia.

When Saudi Arabia announces a move away from the petrodollar system, that will be a major trigger event for the global financial system and it will be a really, really bad sign for the U.S. economy.

The level of prosperity that we are enjoying today would not be possible without the petrodollar system. Once the petrodollar system collapses, a lot of our underlying economic vulnerabilities will be exposed and it will not be pretty.

Tough times are on the horizon. It is imperative that we all get informed and that we all get prepared.

But read the whole article. Highly informative and understandable!!