"Modern archaeology suggests that descendants of nomadic Siberian people may have established communities in the Andes Mountains as early as 10,000 B.C.E.37 Aymara-speaking tribes migrated to the Bolivian altiplano38 around 700 B.C.E, and sometime after 700 B.C.E, Andean people began growing coca in the altiplano.39 Before the Spanish conquest, Indians of eastern Bolivia grew coca for tea, chewing, and ritual use."
Source
Freisinger, Will, "The Unintended Revolution: U.S. Anti-drug Policy and the Socialist Movement in Bolivia," California Western International Law Journal (San Diego, CA: California Western School of Law, Spring 2009) Volume 39, Number 2,
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