I strongly suggest to see this documentary. It will help people understand a lot of things about “how” things actually works in the [en:World Economy], why we trade Money and… why [en:USA] holds in its hands the balls of the World Economy. Or, doesn’t it?
The Day of the Dollar Roel van Broekhoven (Backlight 2005)The documentary is in [en:Dutch] with English subtitles.