In Radical Cities, Justin McGuirk travels across Latin America in search of the people and ideas shaping the way cities are evolving: "after decades of social and political failure, a new generation has revitalised architecture and urban design in order to address persistent poverty and inequality. Together, these activists, pragmatists and social idealists are performing bold experiments that the rest of the world may learn from." The following is an excerpt from Radical Cities on PREVI - the great, but all-but-forgotten experimental housing project in Lima that counted James Stirling and Aldo van Eyck among its contributors.

In a northern suburb of Lima is a housing estate that might have changed the face of cities in the developing world. Its residents go about their lives feeling lucky that they live where they do, but oblivious to the fact that they occupy the last great experiment in social housing. If you drove past it today, you might not even notice it. And yet the Proyecto Experimental de Vivienda – PREVI for short – has a radical pedigree. Some of the best architects of the day slaved over it. Now it is largely forgotten.