The PpA's issue 27 intends to reflect on the words and works of a generation of architects that experienced the contradictions and profound transformations -ideological, social, and cultural- that marked the 1960s. In a time of great demographic and territorial pressure, but also of prodigious technological development, epitomised by space exploration, architects pursued visionary solutions for a distant future, seeking to answer the problems of urban organization and habitat in the face of an everyday environment of increasing alienation. The essays assembled here inquire on the methods and discourses through which architects reconsidered the disciplinary dilemmas and tensions generated by the city and the crisis of existing collective housing models. From idealistic visions to the crudeness of the market, from the rhetoric of the debate to polarizing figures, from modular systems to the production of urban megastructures, the themes addressed here function as very different entry points for the inquiry of disruptive processes in the architecture and urbanism of this period.