This chapter examines the progression of disaster risk reduction (DRR) from a marginal policy concern to a central topic on the international agenda, especially within the United Nations framework. The chapter explores how shifting perspectives on disasters—from isolated natural events to complex social constructs intertwined with vulnerability—have influenced policy development over time. Initially, DRR efforts were largely technical and state-centric, but evolving understandings of disaster vulnerability and resilience have fostered a more integrated approach. The United Nations Office for Disaster Risk Reduction (UNDRR) has been instrumental in this shift, particularly through major frameworks like the Hyogo and Sendai Frameworks, which emphasize resilience and the reduction of systemic vulnerabilities. Using Peter May’s "Policies With and Without Publics" framework, this chapter analyzes the transformation of DRR from an area dominated by experts to one marked by active public and international involvement. This development underscores the importance of inclusive, multi-sectoral collaboration in addressing the rising global demand for effective DRR strategies. Ultimately, the chapter highlights the role of the UNDRR in aligning DRR with broader sustainability and climate agendas, thus positioning DRR as a fundamental aspect of global governance.