Colombia has a long tradition in coca production and than illegal trade with cocaine and unfortunately this is what is the country's trademark. Unlike some of the South American countries where it is noticed a drop in coca production, Colombia is actually having an increase in production, and a very significant one, every year in the past 6 years there's more and more plantations with coca and there is more and more cocaine production that ends up illegally all over the world. This process is mainly sponsored and under the wings of the Colombian cartels.
Among the northern Andean countries strongly involved in the illegal coca and drug trade, "Peru" is now the predominant coca producer, although it should be noted that the data we have for this is not necessarily up to date.
Answer: Some societies succeed and others fail for many reasons. They could have a bad ruler, it depends on thier rules, how the people in the society behaved, etc.
