Functionalism proposes that international cooperation through non-political, technical organizations in areas like health, transportation, and economic issues can help reduce conflicts between states and lead to greater international integration and potentially an international government. It argues that addressing common problems through functional cooperation will increase interdependence and spill over into greater and deeper integration. While functionalism aims to build authority based on needs rather than politics, neo-functionalism focuses on regional integration and the momentum of integration spreading across issues over time through spill-over effects.