Could Chatham, a middle-class enclave on Chicago’s South Side, a community with strong identity and active block groups, weather recent violence?  “If Chatham could maintain its relative stability despite such great challenges,” said William Julius Wilson, “then I think this concept of a neighborhood effect will be a landmark contribution, helping us understand how to prevent the out-migration of citizens and strengthen neighborhoods” at risk of falling into poverty.”  Diagnosis: Battered but Vibrant: Lessons in Community from Chicago's South Side, New York Times, Science Times, January 7, 2013.