Over the last five years, I have found myself circling around four key concepts: Performance. Philosophy. Animals. And Equality. And I have found myself thinking in and with circles. It began with the various references to circles we can find in the philosophy of Henri Bergson - in his idea of the field …

Martijn de Waal is a senior researcher at the lectorate of Play and Civic Media and a member of the Citizen Data Lab at the Amsterdam University of Applied Sciences. Het is the author of The City as Interface. How Digital Media Are Changing the City (2014), and the project leader of The Hackable City …