A new report from the Urban Displacement Project confirms what anyone who’s lived here already knows: rising housing costs are resegregating the Bay Area.

Researchers found that between 2000 and 2015, soaring rents pushed thousands of low-income black households out of what were once racially and economically diverse neighborhoods in Oakland, Berkeley, San Francisco, and Richmond. Nearly half of those who relocated left the Bay Area altogether, and many of the rest have moved to more racially segregated and economically homogeneous — that is, poorer — suburbs like Antioch and Pittsburg to the east, and the Eden area to the south.

Like every American metropolitan area, the Bay Area boasted a great deal of racial and social inequality before 2000. But by some measures it had come a long way from the mid-twentieth century, when many of the region’s subdivisions were redlined and legally segregated. By the 1990s, for instance, Oakland was the most ethnically diverse city in the country and was helmed by black political and corporate leadership.