America's black market is much larger than we realize, and it affects us all deeply, …
The Revolution of 1910 prompted a wave of Mexican immigration to the American Southwest.... Marijuana was depicted as an alien intrusion into American life, capable of transforming healthy teenagers into sex-crazed maniacs. In 1914, El Paso, Texas, enacted probably the first local ordinance banning the sale or possession of marijuana; by 1931, twenty-nine states had outlawed marijuana.
— Reefer Madness by Eric Schlosser (Page 19 - 20)