According to many Islamic jurists, the world is divided between dar al-Islam (the abode of Islam) and dar al-harb (the abode of war). This dual division of the world has led to a great amount of juridical discussion concerning what makes a territory part of dar al-Islam, what the status of Muslims living outside of this is, and whether they are obliged to obey Islamic jurisprudence. Susanne Olsson examines the differing understandings of dar al-Islam and dar al-harb, as well as related concepts, such as jihad and takfir. She thereby is able to explore how these concepts have been utilised, transformed and negotiated throughout history. As the subject of Muslims living in Europe is such a topical and sometimes controversial one, this book will appeal to researchers of modern Islam as integral to the Western experience.