Okay here is one: We haven't. A strong argument can be made the USD (and most the world's curreines) are backed by oil as oil may only be exchanged for USD. F

Okay here is one: We haven't. A strong argument can be made the USD (and most the world's curreines) are backed by oil as oil may only be exchanged for USD. Furthermore inflation tracks oil sale perfectly since the petro-dollar started.