" Lefebvre’s concept of heterotopia (radically different from that of Foucault) delineates liminal social spaces of possibility where “something different” is not only possible, but foundational for the defining of revolutionary trajectories. This “something different” does not necessarily arise out of a conscious plan, but more simply out of what people do, feel, sense, and come to articulate as they seek meaning in their daily lives. Such practices create heterotopic spaces all over the place. We do not have to wait upon the grand revolution to constitute such spaces. Lefebvre’s theory of a revolutionary movement is the other way round: the spontaneous coming together in a moment of “irruption,” when disparate heterotopic groups suddenly see, if only for a fleeting moment, the possibilities of collective action to create something radically different. That coming together is symbolized by Lefebvre in the quest for centrality. The traditional centrality of the city has been destroyed. But there is an impulse towards and longing for its restoration which arises again and again to produce far-reaching political effects, as we have recently seen in the central squares of Cairo, Madrid, Athens, Barcelona, and even Madison, Wisconsin and now Zuccotti Park in New York City. How else and where else can we come together to articulate our collective cries and demands? "

― David Harvey , Rebel Cities: From the Right to the City to the Urban Revolution