A different world is possible [1]. The work of an increasing number of architects reveals a renewed social interest and aspiration to define new instruments for coping with the issues of our cities. These architects do not subscribe to the agendas of bureaucrats, authorities and market players. Instead they listen to people's remarks, understand their problems and develop tools that stimulate people to think critically and actively about the built environment. For these activists, architecture goes beyond just designing buildings. It has to identify the needs of people and possible forms of aggregation, while stimulating processes that will enable us to live better. Groups like Team 10 and the movements of the '70s laid the bases of these practices, but unlike the past century, today every project becomes a sensitisation campaign that involves the community at the local level and that stimulates collective processes, spontaneous creativity and activism in order to incite a new political role for architecture.