According to Richard Rothstein in his 2017 book, Color of Law: A Forgotten History of How Our Government Segregated America, “we have created a caste system in this country, with African-Americans kept exploited and geographically separate by racially explicit government policies,” he writes. “Although most of these policies are now off the books, they have never been remedied and their effects endure.” Zoning was one of the policies that contributed significantly to this outcome.