This article examines the vital role of Christian theologians in engaging the three public domains—Church, Academia, and Society—within the framework of David Tracy’s "three publics" theory. The study is anchored in Matthew 5:13-16, where Jesus describes his followers as the "salt of the earth" and "light of the world," highlighting their transformative and preservative roles. Nigeria, a nation characterized by religious pluralism, socio-political challenges, and developmental needs, serves as the context for this investigation. While existing literature addresses the role of theologians in faith communities, there remains a gap in understanding their integrated contributions to ethical governance, intellectual leadership, and societal transformation in multi-religious and developing contexts like Nigeria. By situating the discussion in Nigeria and extending its relevance globally, the article underscores the potential of Christian theologians to provide innovative solutions to pressing socio-political and ethical challenges, ultimately inspiring global theologians to embrace their multifaceted responsibilities. Anchored in David Tracy’s "three publics" framework, this study examines how theologians contribute to moral leadership, intellectual advancement, and societal transformation, with a particular focus on Nigeria. As a nation marked by religious diversity, socio-political challenges, and urgent developmental needs, Nigeria provides a compelling context for understanding the intersection of theology and practical societal engagement. The article argues that theologians are pivotal in addressing ethical governance, fostering social justice, and encouraging interfaith dialogue—critical issues that resonate not only in Nigeria but also in other multi-religious and socio-politically complex nations. Ultimately, the study demonstrates how theological insights, when applied thoughtfully, can address both national and global challenges, offering a framework for Christian theologians worldwide to contribute meaningfully to the pressing issues of their times. [ABSTRACT FROM AUTHOR] more...