Modularizing and integrating theories of justice

Theories in the justice area have proliferated with little regard either to their interconnections or to the general scientific criterion of parsimony. Recently, there have been several attempts to integrate justice theories. However, there has been practically no discussion of theoretical method, that is, precisely what it means to integrate two or more theories and what must be done to accomplish it. This chapter advocates building integrated theories by developing smaller modularized theories that can be formulated and assembled for multiple purposes. To illustrate the process, we construct five modules addressing different areas connected to justice issues and show how they may be combined into a single integrated structure.