The discovery and rapid development of unconventional oil resources in the United States during the first quarter of the twenty-first century has increased the global supply of crude oil and significantly influenced global oil prices. This research defines the United States' unconventional oil production as the most important influence on global oil prices from January 2006 to the present, with two to five times the relative importance compared to the United States conventional, Saudi Arabian, other OPEC, OPEC+, and the rest of world oil production