There was even a hierarchical system in the suburbs. There are upper-class suburbs, working-class suburbs, industrial suburbs, and “suburban” neighborhoods within city limits. Also, most of the white population was now living with the non white population. In this case there had to be racial segregation. the houses were segregated by provide houses through mortgages to the non whites. Even after the Supreme Court in 1948 declared such provisions legally unenforceable, banks and private developers barred non-whites from the suburbs and the government refused to subsidize their mortgages except in segregated enclaves.