Redlining was the once-common practice in which banks would draw a red line on a map—often along a natural barrier like a highway or river—to designate neighborhoods where they would not invest. Stigmatized and denied access to loans and other resources, redlined communities, populated by African-Americans and other people of color, often became places that lacked businesses, jobs, grocery stores and other services, and thus could not retain a thriving middle class. Redlining produced and reinforced a vicious cycle of decline for which residents themselves were typically blamed.
This is how I think my main subunit was treated for years. My younger colleague blames himself for not having gotten more done, but I disagree.