-Developed a subcultural theory that aimed to explain why violence and crime is higher inner-city, African American neighborhoods
-Conducted field research in Philadelphia in the 1990s
-Due to very deprived inner-city conditions, black residents in these areas feel a sense of hopelessness, despair, and isolation
-Despite this, the majority of black families in the inner city still believe in middle class values
-However, these values carry no weight on the street, particularly among young urban males
-The street had its own code and values that regulate behavior and social interactions (The Code of the Streets)