Another main idea in revisionist historiography is that hadith studies were revived in the eighteenth century and that hadith was used for socio-moral reconstruction. This last notion implies that the significance of hadith was in the practical ordering of social life and providing a blueprint for social behaviour, and not on intellectual grounds. In contrast, the book argues that some of the most original ideas were introduced in the course of academic/theoretical discussions of hadith, in particular the theory of hadith (‘ilm mustalah al-hadith). This chapter traces the development of two distinct schools of hadith studies in India and in Yemen, and teases out the implications of these very radical theories for notions of authority. The chapter proposes new ways of reading and analysing hadith, not just in terms of its social and cultural significance but also in relation to earlier traditions of hadith studies. In contrast to most contemporary critical studies of hadith, which focus primarily on the early period and on the question of authenticity, this chapter argues that these questions are not significant beyond the first three centuries of Islam, and that new techniques of analysis are needed for the study of this important body of literature.