The world's most substantial quantities of coca, the plant from which the illicit drug cocaine is derived, grow in South America, and local manufacturers process almost all of the cocaine there. Coca can be grown in a number of geographic locales, including Mexico, but only the South American geography is ideally suited to naturally cultivate the plant in large enough quantities for mass production. In fact, Peru, Bolivia and Colombia collectively account for all of the cocaine production in the world. Whoever controls the territory where coca is grown and produced controls the worldwide supply of cocaine, but no single South American criminal organization controls all of these territories. The result is an oligopolistic supply network that excludes Mexican drug cartels.