Illegal stimulants are big business all over the world. Across the United States, where illegal drugs are in great demand, sales of cocaine and methamphetamine are brisk. For thirty years, drug enforcement agencies in the United States have tirelessly attacked the illegal stimulant business on multiple fronts.

Sources and shipments of stimulants have been destroyed, leaders of drug organizations have been arrested, and stimulant users have been sent to prison, treatment centers, or both. Nevertheless, Americans continue to have access to and use these dangerous drugs.

How can authorities most effectively stop the endless flow of illegal stimulants into the U.S. market? They direct most of their efforts at investigating the origins of the two most dangerous illegal stimulants marketed on American soil, cocaine and methamphetamine, and then they attack these drugs at their sources. For cocaine...