In the past two decades, governance theories have arisen semi-independently across multiple disciplines. In law and regulation, planning, democratic theory, economics, public management, and international relations, among other disciplines, scholars have sought to describe new strategies of governing. As a result, the notion of governance is now one of the most frequently used social science concepts in the world. No single theory encompasses this diverse body of work, but rather multiple theories with different aims and perspectives. The Handbook on Theories of Governance collects these theories of governance together as an analytical resource for governing in an increasingly complex, fragmented and dynamic society.