Although it is one of the most vague and ambiguous concepts proposed by Foucault, the term "heterotopia" has been, and continues to be, one of the most widely used in technical as well as in human and social disciplines. Coinciding with the rise of postmodernism and the supposed crisis of the great unitary stories of the West, the great heterogeneity of urban and spatial phenomena and typologies referred to in the Foucauldian notion was further expanded, with the explicit intention of using it as part of the new urban ideology that neoliberal theorists of architecture and urbanism were beginning to implement under the leitmotif of the city by fragments. In this way, neoliberal urban ideology appropriated the concept of heterotopia, making it pass for libertarian and endowing it with the ability to exert political resistance to economic and urban planning by public administrations. This is why the concept of heterotopia has been used simultaneously and repeatedly as a tool to praise the beatitudes of neoliberal urbanism as well as to defend its emancipatory character by social movements and activists In this sense, the emancipatory potential that heterotopias could have had in the disciplinary arrangement of space has ended up transforming into a magic formula with which to transform the impositions of the neoliberal (de)arrangement of the territory into a hymn to freedom of movement, to a socio-cultural diversity without class conflict. The aim of this collective and interdisciplinary reflection is to prove that heterotopias are spaces that cannot be considered a priori as directly emancipatory but apart from an effective political project. As we live in a postmetropolitan word, we should ask: Are these post-metropolitan heterotopias capable of shaping themselves as the new nerve centers of anti-capitalist resistance or are they only capable of subverting the disciplinary power of public administrations already brought to crisis-point decades ago by neoliberal capitalism? Can they function as the spatial tools of an antagonistic politics for the common or, on the contrary, is their operation intrinsically neoliberal? This book brings together various analyses and investigations that maintain conflicting positions on the emancipatory or ideological-alienating character of heterotopias with the dual objective of avoiding their Western-centric bias and preserving any possible trait of emancipatory potential that may be rearticulated from an epistemological diversity viewpoint. With these objectives in mind, we have organized the twenty-two articles that make up this book into five major thematic sections, coinciding with some of the main topics around which socio-spatial debates dedicated to heterotopias have taken place in the last twenty-five years: the postmetropolis, public space, the right to the city, gender relations and their symbolic condition. Although these five categories should not be understood as unrelated compartments -but quite the opposite- we have chosen to use this classification as an analytical tool to illuminate some of the focal points around which to exercise effective critique of one of the most frustratingly incomplete, inconsistent [and] incoherent concepts of socio-spatial theory.