DRR includes disciplines such as disaster management, disaster mitigation and disaster preparedness, but DRR is also a critical part of sustainable development. In order for development activities to be sustainable, they must also reduce disaster risk. On the other hand, unsound development policies will increase disaster risk - and disaster losses. Thus, DRR involves every part of society, every part of government, and every part of the professional and private sector.
The United Nations Office for Disaster Risk Reduction (UNISDR) was established in 1999 as a dedicated secretariat to facilitate implementation of the International Strategy for Disaster Reduction. UNISDR coordinates, campaigns, advocates and informs all stakeholders about disaster risk reduction. UNISDR has a mandate by the United Nations General Assembly "to serve as the focal point in the United Nations system for the coordination of disaster reduction and to ensure synergies among the disaster reduction activities of the United Nations system and regional organizations and activities in socio-economic and humanitarian fields" (UN General Assembly Resolution 56/195).