Carlo Ratti wants to understand how technology shapes the design of cities, and the lives of the people who live in them. The architect and engineer at the Polytechnic University of Milan in Italy also directs the Senseable City Lab at the Massachusetts Institute of Technology (MIT) in Cambridge. Ahead of the World Architecture Festival in Fort Lauderdale, Florida, this month, he discusses artificial intelligence and climate adaptation, and argues that citizens, not algorithms, should be the architects of the future.