This book argues that the meaning of "secular" in the West and in Islam differ fundamentally. Though the Islamic secular is a "liberation" from Islam's sacred law, shari'ah, it is neither outside "religion" nor a rival to it; it seeks neither to discipline nor displace religion nor expand its own jurisdiction at religion's expense. The Islamic Secular is, in Sherman Jackson's view, a complement to religion-in effect, a "religious secular." In this book, Jackson makes the case for the Islamic Secular on the basis of Islam's own pre-modern juristic tradition and shows how the Islamic Secular impacts the relationship between Islam and the modern state, including the Islamic State.