David Simon is Professor of Development Geography, Royal Holloway, University of London, and was also Director of Mistra Urban Futures, Gothenburg, Sweden from 2014–2019. A former Rhodes Scholar, he specialises in cities, climate change and sustainability, and the relationships between theory, policy and practice, on all of which he has published extensively. At Mistra Urban Futures, he led the pioneering methodological research on comparative transdisciplinary co-production. His extensive experience includes sub-Saharan Africa, South and Southeast Asia, the UK, Sweden and USA. His most recent books are Rethinking Sustainable Cities: Accessible, green and fair (Policy Press, 2016), Urban Planet (Cambridge Univ Press, 2018), Holocaust Escapees and Global Development: Hidden histories (Zed Books, 2019), Key Thinkers on Development (2nd edn, Routledge, 2019), Comparative Urban Research from Theory to Practice: Co-production for sustainability (Policy Press, 2020) and Transdisciplinary Knowledge Co-production: a guide for sustainable cities (Practical Action Publishing, 2021).