What Are The Reasons Why There Is So Much Poverty

What are the reasons why there is so much poverty in Detroit and Compton. Specifically hit points on the gangs in those areas, the crime/murder rates, and how education is also a factor in why poverty is low. Also on what those cities are doing to make it better. For Detroit, speak a little bit on the head chief of police James Craig and his contributions. 2 to 2 and a half pages. The amount of online sources does not matter.