Why is Marijuana Illegal?

I've been pondering through this question for many years and so many other have probably stumbled upon this question too, but why is Marijuana illegal?  According to an article by Pete Guither "many people thought that marijuana was made illegal through some kind of process involving scientific, medical, and government hearings; that it was to protect the citizens from what was determined to be a dangerous drug." As the article continues, it shows you the history of the criminalization of marijuana. There's a common misconception that Marijuana was criminalized because the paper mills would lose profit, the paper mills contributed to it but the main cause was racism and corrupt Legislatures.  Harry J. Anslinger recognized the Bureau of Narcotics and how much of a career oppurtunity it would be for him so he automatically threw the themes of racism and violence to draw attention to the public so he could build his agency, some of the ideas quoted by Harry Anslinger are a bit racist so please do not take offense, but according to Harry Anslinger “…the primary reason to outlaw marijuana is its effect on the degenerate races.”, “Marijuana is the most violence-causing drug in the history of mankind.”
 and also “Reefer makes darkies think they’re as good as white men.” These statements are very invalid and pose no strong point but that's the main reason why Marijuana was deemed illegal in the 1930's and it's still illegal today.