Even if you aren't interested in this subject, I recommend the movie anyway. It is truly hilarious. There have been numerous scientific studies that have suggested marijuana is no more harmful or addictive than alcohol or cigarettes. But the federal government refuses to make marijuana available to those who need it because there is a stigma attached to marijuana that makes it socially unacceptable. In my personal experience, I have found alcohol to be much more dangerous than marijuana.
Drunk people tend to get into fights, car accidents and other unpleasant situations.
People who are stoned tend to sit on the couch. I do not mean to suggest that marijuana is harmless. But alcohol and tobacco are not harmless, either, yet both are legal and socially acceptable. This double-standard is completely without a logical basis and is reprehensible when you consider the medical advantages of marijuana. The country is probably not ready to consider legalizing marijuana yet, but keeping it away from people who could really benefit from its use is cruel.