Throughout the early period of the AHA's existence, public housing was closely connected with slum clearance. This was especially emphasized by US Secretary of the Interior Harold Ickes, who saw slum clearance as a positive good in itself, regardless of whether the units were replaced with public housing. Nonetheless, at the time it was taken for granted that replacement housing had to be built. In addition, public housing during this period was seen as a tool for shaping the working class into model citizens. In Atlanta as elsewhere, tenants were carefully chosen in order to conform to middle-class values (for example, no unwed mothers). This created communities that were largely homogeneous, mostly consisting of young married couples with children. Only in the postwar era would public housing begin to serve lower-class families, and only gradually would it become associated with the poorest of the poor.