This document discusses rising inequality in cities and the spatial divisions between wealthy and poor residents. It notes the growth of exclusive, gated communities for the wealthy that isolate them from the problems faced by those in poorer areas. This spatial divide weakens social cohesion and the ability of urban elites to engage with and address issues outside their enclaves. When the affluent retreat into isolated, "fortified" spaces in the city that insulate them from social issues, it can undermine empathy for the poor and lead to the neglect of growing problems in other areas.