What does ‘redlining’ in 1940s Chicago have to do with today’s Black exodus from the city? Plenty, a new study suggests

CHICAGO — Vacant and abandoned properties clustered on the Chicago’s South and West sides and southern suburbs have been a stubborn problem for decades. Every two years, the Cook County treasurer tries to return those properties to productive use during its biennial scavenger sale of delinquent taxes, often with little luck.

A new analysis from a team at Treasurer Maria Pappas’ office sought to find out why. Their answer: Federal “redlining” maps that sanctioned discriminatory lending policies in the late 1940s correlated strongly with sites of vacant and abandoned properties today.

, “Maps of Inequality: From Redlining to Urban Decay and the Black Exodus,” argues that those redlined maps “set in motion urban decay and fueled an ongoing exodus of Black people from Chicago and other major U.S. cities,” including Detroit and Philadelphia. The policy led to “vast swaths of vacant lots,