So why is marijuana illegal? The illegalization of Cannabis was first set in a few American states in 1920, based solely on racial prejudice. Newspapers began printing articles about Mexicans and African Americans that smoked this drug were disrespectful to white people, and were seducing white women with this drug and their satanic music. By 1935 marijuana was proclaimed to be ***"the most violence causing drug known to man" by Harry J. Anslinger, director of the Federal Bureau of Narcotics (1931-1962), who demanded federal laws prohibiting marihuana. ***The effects of Weed observed suggest that it may be more likely to neutralize aggressive and criminal acts.