Maybe the Global Village metaphor has never been more accurate than it is today, where societies join forces in the fight against the COVID 19 pandemic, in a global coordinated effort, possibly never tested before in the known history of Humankind. Although we are sure that in the past some other shared demands have united the different peoples of the world, this has never been so strongly necessary, mainly in what the global scientific community is concerned. This is a fight for the survival of a society. However, we should not lose sight of what we are fighting for. We fight together for people. Not just for the abstract value of Human life, but for life in society as a whole, including its moral and ethical aspects. The topics of this book are based on this claim, on what makes it possible. We do not build our lives in a vacuum, or in distant Invisible Cities, but through a higher value, which represents physical life in society: the City, built by the discipline of Urbanism. This book is a spin-off of the International Research Seminar on Urbanism_SIIU2020. Inspired by the contents of twelve research seminars, a group of researchers from the universities of Barcelona, Lisbon and Sao Paulo discuss the contemporary agenda of research in Urbanism. Following the conference, a selection of 35 original double-blind peer-reviewed research papers were brought together with different perspectives about such an agenda.