Neil E. Harrison is Executive Director of The Sustainable Development Institute (since 2000) and holds a PhD from the University of Denver. His most recent work is with John Mikler—Capitalism for All (forthcoming)—and the edited volume Climate Innovation (2014).Robert Geyer is a Professor in the Department of Politics, Philosophy and Religion at Lancaster University (UK). His more recent works include: Handbook on Complexity and Public Policy (2015, edited with Paul Cairney) and Complexity and Public Policy (2010, co-authored with Samir Rihani).Contributing authors:Samir Rihani has had an eclectic career in planning and development in the UK and Middle East. His publications include: Complex Systems Theory and Development Practice (2002) and Complexity and Public Policy (2010, co-authored with Robert Geyer). Jude Rowley is a graduate student at Lancaster University, UK. His work centres around the intersection between history and international relations and draws upon concepts from complexity and the natural sciences.

• Introduction: From simplicity to complexity Neil E. Harrison and Robert Geyer1. From order to complexity: The natural and social sciences Robert Geyer and Neil E. Harrison2. From order to complexity in policy and governance Robert Geyer and Neil E. Harrison3. Challenges to complexity, pragmatism and the case of Brexit Robert Geyer and Neil E. Harrison4. History, complexity and governance Jude Rowley, Robert Geyer and Neil E. Harrison5. Health, complexity and governance: The case of the COVID-19 pandemic Robert Geyer and Neil E. Harrison6. Governance in development: The case of Middle East and North Africa Samir Rihani7. Governing economy Neil E. Harrison and Robert Geyer8. Governing earth: The importance of the local Neil E. Harrison and Robert Geyer9. Governing global politics Neil E. Harrison and Robert Geyer10. Conclusion Neil E. Harrison and Robert Geyer