What societal stratification has historically resulted from restrictive single-family zoning provisions?

Answer

Economic and racial segregation

Historically, single-family zoning, which often mandates large lot sizes and excludes multi-family housing, has been used intentionally or unintentionally to promote economic and racial segregation by limiting affordability.

What societal stratification has historically resulted from restrictive single-family zoning provisions?
inventorsystemregulationurban planningzoning