The worldwide famous love affair between S. Freud and Cocaine was a rare incident of no dependence. More commonly this love affair consumes the person and destroys their life. Cocaine has been around for thousands of years, it's derived from small leaves of the cocoa shrub in rainforests in South America. The culture of chewing cocaine leaves, which contains 2% cocaine, goes back to the Inca civilization. Even to this day, chewing cocoa leaves is part of the culture in that region, though due to the low cocaine content there's very few instances of toxicity or abuse.