Islamic Law never achieved unity but expressed itself in five surviving schools, which, at their foundation, were in competition with one another. This book looks at the different types of and "naskh and " or the Islamic theories of abrogation. The author shows that the term and "naskh and " has various meanings, including abrogation of certain Qur'an rulings, a formalisation of presumed omissions from texts of the Qur'anic relevations, and the apparent omission from the texts of verses whose allegedly and "once revealed and " claims of scholars are examined in detail and are shown to have had their origins in the interpretations of the Qur'an in the earliest period of Islam.