right now we don't know much about MJ's medicinal and industrial use thanks to those cases in the 1930's making MJ illegal. I bet if hemp were never made illegal, history would be wayyy different. Hemp's industrial use would have radically changed the way our society has evolved, from the use of its fibers, to the use of its seeds for fuel, I read somewhere about how hemp seeds can be used to make even better fuel than gasoline, at the same price or less, imagine that, a US economy not dependent of foreign energy. Imagine how much of this stuff we would have figured out by now if it weren't made illegal back then.
look at what the old guy said in the video, that the government (with the help of corporations of course) has created the biggest genocide in history from keeping cannabis from us all this time, and its probably true, we would have cured cancer by now if we had 80 years of research into MMJ. I am pretty positive of marijuana's cancer killing effects, it is probably the result of a mix of cannabinoids, imagine if we could get just the right mixture of cannabinoids for curing cancer, cancer wouldn't even be a problem anymore. If MJ shows promising effects for curing cancer now, when we really learn to ssynthesize and seperate all the different cannabinoids, we will be making super drugs.