Burgess defines differentiated zones created from the expansion of the city, where people are sorted by residence and occupation. He describes a process of organization, disorganization, and reorganization in terms of metabolism moving toward equilibrium. Reading this part of the text, I was reminded of how cities Los Angeles are so segregated that each neighborhood functions almost independently and the process of organization, disorganization, and reorganization never occurs between zones. While Burgess seems to suggest that the formation of these zones promotes movement, I wonder if they could also inhibit movement.