Oil is a natural resource formed by the decay of organic matter over millions of years. And like many other natural resources, oil cannot be produced, only extracted where it already exists. Unlike every other natural resource, oil is the lifeblood of the global economy.
The world derives over a third of its total energy production from oil, more than any other source by far. As a result, the countries that control the world’s oil reserves often have disproportionate geopolitical and economic power.