Weed was outlawed by Dupont because they invented plastic to make rope with plastic and not hemp.So they took over the rope world with plastic. Hemp is actually stronger I believe but it's like our incandescent light bulbs being outlawed by Mr. All Gore so he can sell his fluorescent bulb that is trash and if you break one indoors the instructions say call hazmat.
Ya, Dupont also developed a way to get pulp from wood to make paper. Paper before then was made several ways including using Hemp....U.S. States Constitution for example. The other person involved although there was many was Ely Witney, the Cotton Jin inventor. They used Hemp to make clothes which was much more durable than cotton...this is why Civil War Uniforms are still pretty much intact 150 yrs later. My jeans will never last a fraction of that.
Anyhow, that is just what started the ball rolling on banning Marijuana. Now days private prisons and pharmaceuticals are whats keeping it illegal. No U.S. President is ever going to go down in the history books as being the person that legalized it either. Democrat or Republican, it's not gonna happen. The only way things will change is with a Supreme Court ruling. The only way that is gonna happen is if people fight it and the only people with the money and reason to fight it is the legalized pot industry. And those guys aren't going to lift a finger either because they control the industry as it stands. It's going to take some AG, DEA, or President to go after them in order to get them to act.