Patrick Roberts stood before an unusually crowded room at the Max Planck Institute of Geoanthropology—urban scientists sitting next to archaeologists, mathematicians next to artists, all united by a singular challenge: how do we build cities that work for the future?
The world is rapidly urbanizing, and cities are becoming civilization's greatest paradox. They are engines of climate change, yet also laboratories where innovation and sustainability can take root. To harness this potential, researchers face an almost impossible task: they must weave together insights from dozens of disciplines and somehow convert those insights into policies that actually work in real places, for real people. The stakes are enormous. "Decisions made in cities today will shape the future of humanity for generations," says Roberts, director of the Department of Coevolution of Land Use and Urbanization at MPI GEA and lead author of a new study published in Nature Cities.
The solution Roberts and his international team propose is deceptively elegant: stop treating generalists and specialists as rivals. Instead, create permanent institutional spaces where they work in genuine partnership with policymakers and communities from the very beginning.
The framework rests on four core principles. First, bring together researchers with broad, sweeping perspectives and those focused on particular places or problems alongside urban communities and policymakers before any research begins—this ensures the knowledge being gathered actually matters. Second, establish data hubs staffed by both types of researchers that can develop shared definitions and standards across disciplines, so findings can actually speak to each other. Third, treat new case studies not as isolated oddities but as opportunities to test big theories, refine understanding, and update models. Fourth, create regular forums where generalists and particularists present their findings together to community organizations and policymakers, ensuring research conversations happen in real time with those who make decisions.
This framework emerged from a recent gathering at MPI GEA called "Connecting Urbanism Across Time and Space," which brought together an unusually broad coalition: urban scientists, physicists, mathematicians, biologists, archaeologists, historians, anthropologists, and artists. Many participants are advising on the next Intergovernmental Panel on Climate Change (IPCC) report, meaning these ideas are already beginning to influence global climate policy conversations.
Christopher Carleton, a co-author and senior scientist at MPI GEA, captured the heart of the vision: "The particularist and generalist traditions are not only compatible but deeply intertwined. And both are required for understanding the urban past and anticipating the global urban future."
What makes this approach hopeful is that it rejects the false choice between breadth and depth. Cities need researchers who can spot patterns across continents—how informal settlements develop, why certain policies succeed everywhere, what the long arc of urbanization tells us. They equally need experts who know one neighborhood intimately, who understand its history, its specific ecology, its particular vulnerabilities. When these perspectives constantly interact with the people actually living and governing in cities, research stops being abstract and becomes action.
The framework doesn't guarantee perfect policy. But it offers something increasingly rare: a structured way to connect the world's best thinking directly to the decisions that shape where and how billions of people will live.