This entry will analyze the life of Shafiî, the founder of the Shafi’i sect, which is the fourth largest sect of Sunni Islam. It will also explore the several stages of his intellectual development and works, focusing on their relevance to Islamic economics. Shafiî’s perspectives in the domain, which made noteworthy contributions to the organization of Islamic law through his research in the areas of jurisprudence and legal theory, are analyzed in two periods referred to as “Pre-Egypt” and “Post-Egypt.” These periods illuminate his development and the divergence of his methodological approaches. The period before the Egyptian era, referred to as “kawl-i kadîm” or “sect-i kadîm,” reflects his previous beliefs. However, the period that began with his arrival in Egypt is known as “kawl-i jadîd” or “sect-i jadîd,” signifying his new perspectives. It is referred to as the era during which it originated. Shafiî held contrasting ideas to those of Mu’tazila and other theological factions and embraced a method of explanation that focused on divine revelation. Additionally, he formulated the theory of declaration, emphasizing the prophet’s significance. Some aspects of his views on alternative sources of Islamic law have faced criticism. Shafiî’s insights were influential in shaping Islamic law and continue to be cited in contemporary Islamic economic practices. Although Shafi’î has a broad perspective covering the fields of Islamic law and economics, he is an important person especially in terms of his methodological contribution to fiqh methodology (usul al-fiqh).