Replying to Legalization of Marijuana

I am in a class called creative writing, which is basically a class where you sit there and do nothing and the teacher is hot. we have to write some shit and send it to national public radio. it is called "this I beleive". i couldnt think of any topic to do it on so i decided to do "i beleive in the legalization of marijuana" i have to express my opinions and have valid points/ arguements on why i beleive this. i am going to to research on health benefits of marijuana, which i know there are some, but what are your guys thoughts on why marijuana should be legalized?