If you’re not a sports fan, you’ve probably missed ESPN’s “30 for 30″ series, a series of 30 sports documentaries celebrating the 30th anniversary of ESPN’s existence. Missing these films, though, is a mistake, sports fan or not. They are uniformly insightful and profoundly moving. Sports is often just the framework for stories about real people struggling with their real lives. Editions to date have included subjects like a Canadian town mourning the loss of Wayne Gretzky to California, the racially charged trial of a high-school-aged Allen Iverson, and most recently, a film about Ricky Williams, a football player who, apparently, retired from football to be free to smoke marijuana.