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Social Boundary Mechanisms

Political Contention

The article proposes a set of mechanisms that precipitate and constitute social boundary change. Tilly defines social boundary change as the "contiguous zone of contrasting density, rapid transition, or separation between internally connected clusters of population or activity". Mechanisms that cause boundary change are identified as: Encounter, Imposition, Borrowing, Conversation and Incentive shift. Mechanisms that occur as part of boundary change are identified as: Inscription-Erasure, Activation-Deactivation, Site transfer. and Relocation. The result of a combination these two types of mechanisms, Tilly argues, is frequently either a coordinated attack or a coordinated defense.