Chapter 3 deals with Islamic supremacy clauses, source of law clauses, and repugnancy clauses, which are present in almost half of all Muslim countries’ constitutions. Islamic supremacy clauses subjugate all lawmaking to Islam, shari‘a, or Islamic precepts. This chapter traces the origins and incidence of these clauses – by finding their birth in British colonial law – and traces their relationship to demography, geography, colonial history, and human rights provisions.