Minangkabau has experienced a sustained and sometimes violent debate between Muslim reformists and preservers of indigenous culture. During a protracted and bloody civil war of the early nineteenth century, neo-Wahhabi reformists sought to replace the matriarchate with a society modeled on that of the Prophet Muhammad. In capitulating, the reformists formulated an uneasy truce that sought to find a balance between Islamic law and local custom. With the incorporation of highland West Sumatra into the Dutch empire in the aftermath of this war, the colonial state entered an ongoing conversation. These existing tensions between colonial ideas of progress, Islamic reformism, and local custom ultimately strengthened the matriarchate. The ferment generated by the trinity of oppositions created social conditions that account for the disproportionately large number of Minangkabau leaders in Indonesian politics across the twentieth century. The endurance of the matriarchate is testimony to the fortitude of local tradition, the unexpected flexibility of reformist Islam, and the ultimate weakness of colonialism. Muslims and Matriarchs is particularly timely in that it describes a society that experienced a neo-Wahhabi jihad and an extended period of Western occupation but remained intellectually and theologically flexible and diverse.