How filmmaker-philosophers brought the dream of making documentaries and strengthening democracy to award-winning reality--with help from nuns, gang members, skateboarders, artists, disability activists, and more. The evolution of Kartemquin Films--Peabody, Emmy, and Sundance-awarded and Oscar-nominated makers of such hits as Hoop Dreams and Minding the Gap--is also the story of U.S. independent documentary film over the...