This is an introduction to the special issue that presents new research on the state and its links to economic and social development. The special issue focuses on the processes of institutional transformation of the state, looking at how fiscal states arise in the developing world. The resulting set of articles presents a variety of approaches, ranging from case studies (at state and regional level), to comparative historical analysis and to macro-quantitative (country and cross-country level) perspectives. The overarching message is that historical, political and institutional factors are key to understanding the process of fiscal states formation and change around the developing world.