Marijuana very likely is a useful plant that will help many people. As a result, Big Pharma is terrified because people can (and should be allowed) to grow this themselves and Big Pharma won’t be able to make a buck off of American’s pain. It is also likely non-addicting, which is even worse for American corporations. How will they make money if they can’t addict us? So yes, marijuana should be made legal and all past convictions erased.