This entry examines the Ahîlik organization, which is the institutional reflection of the concept of Futûvvet—Turkish Islamic Guild—in Islamic societies in Anatolia. The entry analyzes the conceptual origins, historical development, and socio-economic functions of the Ahîlik organization. The term Ahîlik is derived from the Arabic and Turkish etymological roots of brotherhood and generosity. This unique system integrates traditional economic practices with moral values. The text emphasizes that while Ahîlik regulates production and trade life within the framework of quality, honesty, and measurement standards, it also provides social security to its members in cases of illness and old age through mechanisms such as middle coffers. A historical examination of the institutionalization process during the Abbasid period reveals the emergence of Ahi Evran as a unifying force in thirteenth-century Anatolia. This development occurred amidst a power vacuum created by the Mongol invasion and the weakening of Seljuk authority. The study also draws attention to the dynamic relationship between Ahîlik as both a professional organization and a school of ethics and state authority, its assumption of a local administrative role during periods of weak centralization, and its evolution into a waqf-like structure during periods of strong state authority.