Online gambling has become a major social problem affecting Indonesia’s economic, psychological, and moral life. The rapid development of digital technology has increased public access to online gambling, requiring the involvement of religious institutions in preventive efforts. This study aims to analyze the strategy implemented by Gereja Kristen Jawa (GKJ) Nehemia Lebak Bulus, South Jakarta, in preventing online gambling among its congregation. This research employs a qualitative approach using descriptive-analytical methods through observation, interviews, and documentation. Bruce J. Biddle’s Role Theory is applied to analyze the church’s social and religious functions. The findings reveal that GKJ Nehemia implements an integrated strategy through Marturia, Koinonia, and Diakonia, functioning as preventive, educational, communal, and pastoral approaches. These strategies strengthen the congregation’s moral resilience and contribute to maintaining a zero-case condition regarding online gambling within the church community.
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