What can “tactical urbanism” offer cities under extreme stress from rapid population growth, intensifying industrial restructuring, inadequate social and physical infrastructures, rising levels of class polarization, insufficiently resourced public institutions, proliferating environmental disasters, and growing popular alienation, dispossession, and social unrest? In this essay, Neil Brenner explores this question through a detailed review of the recent MoMA exhibition Uneven Growth: Tactical Urbanisms for Expanding Megacities.  The essay was published on the MoMA’s website, POST.