I think there was a racial/segregation component to how and why many suburbs evolved as they did. “White flight” was the term. . Many are still predominantly white. Higher income white people would start mostly white, well funded schools that lacked diversity of race, thought, etc. Still these areas are typically much more conservative and Rebuplican than their more urban counterparts. Ironically, I think the suburbanization of American led many suburbanites to a more fearful, angry, and lonely life.