Legalizing weed is not in the interest of big business, i.e. tobacco, pharmaceutical, and alcohol companies, and circumventing their power will be a great challenge, if not entirely unrealistic, but it definitely ought to be legal.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell