One of the last papers he turned in for his major, metropolitan studies, was about urban violence.
The lawsuits represent a new front for cities in their efforts to reduce urban violence.
He described the urban violence of last month as a "wake-up call."
But the wall is the final benediction to urban violence.
Others, in a city that has known little urban violence, wanted to see what had happened.
Although urban violence and student demonstrations continued, Humphrey was doing better.
Movies about raw urban violence are a necessary part of the American experience.
This study linked population growth, environmental degradation and urban violence.
Others have come more recently, with the rise in urban violence and drug abuse in the late 1980's.
Brazil's economic recession is also taking place in an environment of spreading urban violence.