This research aims to examine how the fundamental concept of Islam, namely Rahmatan lil’alamin, is embodied within the framework of religious moderation according to the perspective of Nasarudin Umar. This study employs a qualitative method with a library research approach. The primary source utilized is Nasarudin Umar's book titled Islam Nusantara: The Long Road of Religious Moderation in Indonesia, supported by other related literature. The findings indicate that Nasarudin Umar views Islam as inherently moderate, rejecting rigid textual interpretations that incite radicalism. He positions rahmatan lil’alamin as the universal essence of Islam and religious moderation as its direct manifestation, encompassing principles such as tawassuth (centrism), tasamuh (tolerance), tawazun (balance), and musawah (equality). The practical manifestations of his ideas are evident in his inclusive actions as the Grand Imam of Istiqlal Mosque and in the implementation of curricula to build tolerance in educational institutions. Thus, Nasarudin Umar's thoughts offer significant academic and practical contributions to strengthening a peaceful, moderate, and relevant understanding of Islam in Indonesia's multicultural society. Keywords: Moderation; Nasarudin Umar; Rahmatan Lil’alamin;
Copyrights © 2025