How did Weed first get banned?

[WeedWorm]

I'm not 100% sure why MJ was made illegal, but I know that the 30's government made a propaganda film known as "reefer madness." If you have seen the film, they claim that MJ leads to insanity, wild sex orgies, among other b.s. shit. So I am guessing, as someone said, they think it leads to physcosis and mental illness.

http://www.reefermadness.org/ haha