Radical cities : across Latin America in search of a new architecture In Radical Cities Justin McGuirk travels across Latin America in search of activist architects politicians and radical communities. From Chile to Brazil and from Mexico to Argentina McGuirk discovers people who have begun rebuilding and redesigning their environments in radically new ways. After decades of political and architectural failure a new generation has returned to the problems of the city to address the poverty and inequality. This is a generation of activists pragmatists and social idealists and together they are testing new ideas that the rest of the world can learn from. An architect in Chile has designed a new form of social housing where only half of the house is built allowing the owners to adapt the rest; Medellín the murder capital of Colombia has been transformed with innovative public architecture; squatters in Caracas have taken over a 45 story skyscraper Torre David; and architect Jorge Mario Jáuregui has upgraded Rios favelas in exciting new ways