Mexico Drug Cartels

People generally state that legalizing marijauna would cause plenty of problems, regarding things such as with Mexican drug cartels, who make their money in the illegal sale of Cannabis. I believe if marijuana was leaglized that the problems generally associated with these cartels would slowly dissapear. Things such as killings, and kidnappings would slowly die off. Generally these crimes occur becuase of the legal problems dealing with marijuana, and by legalizing the plant, the Cartels would be able to stop with their crimes, and become legitimate businesses, and making them lots of money, which is all that matters to them regardless.