William J. Bennett, former director of the National Drug Control policy under President George H.W. Bush and bestselling author of "The Book of Virtues," and co-author Robert White provide strong societal and scientific arguments against the legalization of marijuana. Marijuana, once considered worthy of condemnation, has in recent years become a "medicine," legalized fully in four states, with others expected to follow. But the dangers are clear. According to Bennett's research, more Americans are admitted to treatment facilities for marijuana use than for any other illegal drug. Studies...