Urban spatial expansion enabled large-scale segregation of people and activities.

Evidence

The crucial aspect of this areal expansion was that it made largescale spatial segregation of activities and persons possible should it be deemed desirable. The preindustrial city might be likened to ~ family of ten living in a single room. All activities and persons, as long as they remained at home, were inevitably piled on top of one another. In the early industrial city, as it were, the family made the first of many moves to a larger house. — Lyn H. Lofland, World of Strangers_ Order and Action in…, 327

Categorization

• XREF: The preindustrial-city-as-one-room family analogy connects directly to the reader’s Lofland/Simmel/Cole project: spatial looseness is the substrate from which urban anonymity and stranger-categorization arise. — connects to: White suburban annexation followed the physical expansion of transportation lines — Kevin M. Kruse, White Flight: Atlanta and the Making of…, 192