This article asks how state formation processes informed the normative frameworks of late-Medieval and early-Modern Latin European and Muslim Middle Eastern regimes. The question at hand is not why pre-Modern regimes discriminated against religious minorities (as well as other groups) during the pre-Modern period, but why Western European states consistently engaged in mass expulsions of their non-Christian subjects from the late thirteenth century onward and the neighboring states of the Middle East did not. Rather than addressing these peculiar policies as (...) a function of religion, culture, or law the article adopts a comparative, contextual method. With the aid of Charles Tilly’s theoretical perspectives it isolates critical variables in pre-Modern Middle Eastern state formation. These variables are then used to shed light on the circumstances and relationships that led to Latin Europe’s mass expulsions of Jews and Muslims between 1290 and 1614. (shrink)