Desc: Robert Zemeckis on Smoking, Drinking and Drugging in the 20th Century: In Pursuit of Happiness: Directed by Robert Zemeckis. With David T. Courtwright, Fred Tomaselli, Arnold Washton, Lynn Wood. On smoking, drinking and drugs in the 20th century. Via interviews with historians and professionals in the drug treatment field interspersed with film clips that delves into the history of USA's relationship with mind-altering substances.