13 alarmist marijuana posters from the 'Reefer Madness' eraAnti-weed film posters Degradation! Vice! Sin! Insanity! Alex Q. Arbuckle 1936-1950 Though hemp was grown as a fiber by the earliest American colonists, and cannabis was used as an ingredient in medicines throughout the 19th century, recreational cannabis smoking first took on a negative connotation in the American cultural imagination when people began to associate it with Mexican immigrants arri
