The development stages of the science of Sababi Nuzul

In the article, the stages of the development of the science of causality are given by periods, and then its separation as a separate science is discussed. Independent works dedicated to this science, their names and authors are mentioned. The similarities and differences between the works written in the early period and the works written in the later period were analyzed. Especially since Imam Wahidi's work “Asbab an-Nizul” is a reliable source that has reached us in its entirety, extensive information is given about its advantages, shortcomings related to the sanad, and even the number of narrations about the reason for the nizul.