to rot. Post-industrial economic decline Over the next few decades The Great Depression, outsourcing and white flight took their toll on North Philadelphia in a fashion similar to other major US cities of the mid to late 20th century, if not in a more pronounced fashion. While residential corridors like Hope Street and Delhi Street had long housed primarily African-American residents, white residents moved out of the city as waves of poor blacks moved in. During the 40s and 50s, much of the area was racially integrated, although smaller streets were usually completely black or white. Whites began to move out slowly at first in the late 1940s as these residents became more affluent and Northeast Philadelphia began to develop new housing with lawns and conveniences such as modern plumbing. In most cases African Americans moved into the vacant houses and as this began to increase, true white flight began. Increasingly, people moved out of North Philadelphia not solely to move into newer homes, but to avoid facing decreasing property values and increased criminality. For a time, Lower North Philadelphia became a great center of black culture and music, most notably jazz. Many commercial corridors were maintained for decades, and a great many musicians came to North Philadelphia, like John Coltrane and Stan Getz. By 1964, North Philadelphia was the city's center of African American culture, home to 400,000 of the city's 600,000 black residents. As the century marched past middle age, many other problems symptomatic of all US cities of the time came about. Many of the neighborhoods in North Philadelphia sprung up around one monolithic factory, which was the center of the community's income. Each factory that closed down devastated its host neighborhood. In this way, the wave of national industrial collapse caused the rapid break up of numerous "factory neighborhoods" in the predominantly working class North Philadelphia. 1964 Columbia Avenue Riot On the evening of August 28, 1964, a black woman named Odessa Bradford got into an argument with two police officers, one black, Robert Wells, and the other white, John Hoff, after her car stalled at 23rd Street and Columbia Avenue. After Bradford refused to comply with the two officers' orders to move the car, because the car had stalled, and she was unable to drive it, an argument ensued. The officers then tried to physically remove Bradford from the car. She resisted and a large