InSight Crime – Many say Mexico’s war on drugs began after former President Felipe Calderon took office in 2006, but a new book suggests that the genesis was prohibitive drug policies enacted by the United States at the turn of the twentieth century, a process that was later fueled by an economic trade agreement.

http://www.insightcrime.org/news-analysis/how-100-years-failed-drug-policy-rise-mexico-cartels