"Although serious drug use is slightly more prevalent in poor minority neighborhoods than elsewhere, the major problem for disadvantaged neighborhoods is drug distribution. These communities are victims not only of their own drug abuse but also of a criminal drug market that serves the entire society. The market establishes itself in disadvantaged communities in part because of the low social capital in these neighborhoods. The drug economy further erodes that social capital."
Saxe, Leonard, PhD, Charles Kadushin, PhD, Andrew Beveridge, PhD, et al., "The Visibility of Illicit Drugs: Implications for Community-Based Drug Control Strategies," American Journal of Public Health (Washington, DC: American Public Health Association, Dec. 2001), Vol. 91, No. 12, p. 1992.