Book excerpt: ROBERT REDFORD has played many Westerners on the big screen: a romantic outlaw in Butch Cassidy and the Sundance Kid (1969) with Paul Newman, a sheriff in Tell Them Willie Boy is Here (1968), a mountain man in Jeremiah Johnson (1972), a rodeo cowboy in The Electric Horseman (1979) with Jane Fonda, a Montana rancher in The Horse Whisperer (1998), which he also directed. He is the founder of Sundance, an admirer of Native American art and culture and a committed environmentalist. He embodies the best values of the American West.