Joaquin “El Chapo” Guzman, reputed to be the most powerful drug trafficker in the world, was recently arrested after a long manhunt. His capture fixes attention once again on the extremely wealthy, utterly brutal drug cartels that have plundered Mexico and are increasingly active in the United States, where they earn as much as sixty billion dollars a year from American consumers who keep them in business as long as there’s a black market for drugs. Where cartels go, crime and corruption are sure to follow. Chicago is a current example.