What a Long Strange Trips It's Been - Jerry Garcia of the Grateful Dead Historical Perspectives The legal history of cannabis in the U.S. dates back to 1906 with the passage of laws listing cannabis as poison in many states. Total prohibitions began in the 1920s, with cannabis being regulated as a drug in every state by the mid-1930s by the adoption of the Uniform State Narcotic Drug Act. The first national regulation was the Marihuana Tax Act of 1937. Cannabis cultivation played a central role in the establishment of the United States. Supporters of cannabis legalization love to point out that our founding...