Chapter 4 uses assemblage theory, which is an anti-colonialist theory of social and spatial construction that has traction in the Global South, to show how urban inequalities become assembled, disassembled, and reassembled over time and yet how grassroots activism for social and environmental justice and for community resilience can change the form and functions of cities. Buchanan arose at a time when the role of urban planning in the US cities was growing but largely conceived as the top–down imposition of order and dominant values on urban space. However, we are increasingly aware of just how contested and evolving the practice of urban planning and urban development are. Case studies of green gentrification from Los Angeles, California and Accra, Ghana illustrate the competing ideological perspectives on resilience in cities and the potential for and yet tentativeness of progress towards social justice in urban planning. The chapter explores the connections of racism in American land use with colonialism in the Global South, and the commonalities in the experiences of grassroots social-justice movements across cities worldwide.