Argumentative essay on Legalizing Marijuana

Using Eric Schlossers Reefer Madness as your primary piece of evidence write and articulate, coherent, and well-organized essay in which you argue your position on how one of the following social institutions.
I have chosen Marijuana and to argue legalization with limitations of medical needs like cancer and chemo patients.
The page limit is 5-6 pages this means 5 full pages and at least a full paragraph on the 6th page.
The only source to be used is Reefer Madness by Eric Schlosser