The Los Angeles School of Urbanism is an academic movement which emerged during the mid-1980s, loosely based at UCLA and the University of Southern California, which centers urban analysis on Los Angeles, California. The Los Angeles School redirects urban study away from notions of concentric zones and an ecological approach, used by the Chicago School during the 1920s, towards social polarization and fragmentation, hybridity of culture, subcultural analysis, and auto-driven sprawl.[1]