Document summary
Global cities are faced with rising and diverse social needs. Cities develop evolutionary network structures in an attempt to address these. Although the growth of a global city will transform the urban structure in terms of both hard and soft social systems, we must examine the alternating mechanism to attain the comfortable societies. This article aims to find the empirical facts to confirm the theory in the mechanism of the global cities. This positive research might inspire the access to this mechanism analysis from many fields of researchers and could pave the way to the interdisciplinary approach to the global cities. Since the theoretical framework is firmly constructed by the comprehensive system analysis of current societies, the political implication from this framework could provide the effective political method to cope with urgent urban problems.