The Baduy Indigenous community faces environmental degradation, threats to biodiversity, and socio-cultural disruption. They have implemented sustainable living principles through tradition-based mitigation initiatives, such as the Kawalu ceremony, to overcome these challenges. This chapter explores the sustainability practices of the tradition-based Baduy community and their relevance for overcoming socio-ecological crises. The research was conducted using qualitative methodology with an eco-populist approach. By studying Kawalu traditions, we can understand how traditional practices can effectively mitigate the crisis. Eco-populism in the Kawalu tradition is demonstrated by protecting nature from various threats. These measures include limiting tourist visits, preventing over-exploitation, and preserving sustainable agricultural techniques. During the Kawalu period, the entire Baduy area is closed to outside visitors and the Baduy community is busy cleaning the entire village of objects prohibited by custom. Likewise, community members are prohibited from traveling long distances and observe certain taboos. This tradition is an effort to mitigate the socio-ecological crisis from the threat of environmental degradation and ensure the availability of natural resources for future generations. The novelty explored in this chapter is the role of the Kawalu tradition in mitigating contemporary “disasters” due to the socio-ecological crisis along with the increasing phenomenon of mass tourism, the climate crisis, population pressure, and socio-cultural changes which do not always have a positive impact on the future of society, especially the Baduy community.