In "A Common Justice" Uriel I. Simonsohn examines the legislative response of Christian and Jewish religious elites to the problem posed by the appeal of their coreligionists to judicial authorities outside their communities. Focusing on the late seventh to early eleventh centuries in the region between Iraq in the east and present-day Tunisia in the west, Simonsohn explores the multiplicity of judicial systems that coexisted under early Islam to reveal a complex array of social obligations that connected individuals across confessional boundaries. By examining the incentives for appeal to...