Contents and AbstractsPrologue: War in Times of Peace chapter abstractThe Prologue offers a theorization of the spatial and temporal logics of the war yet to come through which Beirut's south and southeastern peripheries are governed and regulated. It locates these peripheries spatially in the city, and provides an overview of how these peripheries, in times of peace, have been transformed into frontiers of urban growth and sectarian violence largely through the spatial practices of religious-political organizations, mostly former civil war militias and the major political players in post-civil war Lebanon. These organizations include the Shiite Hezbollah, the Sunni Future Movement, the Druze Progressive Socialist Party (PSP), and the Christian Maronite Church. Chapter 1: Constructing Sectarian Geographies chapter abstractThis chapter introduces the discourses through which sectarian geographies are constructed in Beirut's peripheries. It discusses how commonly used terms like environment (bia in Arabic) and demography can be used to depoliticize spatial policies and practices of segregation, discrimination, and fear by relegating them from realm of the political to the realm of the natural and scientific. Through an overview of the study's approach, which included patching stories and maps together with real-time data collection, this chapter engages with the methodological question of conducting research in contested spaces and violent geographies. This chapter also situates the book within the interdisciplinary fields of urban and planning studies, Middle Eastern studies, and studies on conflict urbanism and militarization. It also explains the three research sites, and theorizes the ways in which they, together, contribute to an understanding of the geographies and temporalities of the war yet to come in contested spaces. Chapter 2: The Doubleness of Ruins chapter abstractThis chapter examines the still visible, expansive geography of war-scarred ruins left by the civil war in Hayy Madi/Mar Mikhail, by examining the transformation of these geographies of ruins within the unfolding sectarian-political spatial conflict. The doubleness of ruins arises from their being products of both a past civil war and a present territorial war that is not so different from the civil war but that uses different tools. Through this exploration, the chapter shows how the Hayy Madi/Mar Mikhail neighborhoods have become one of the major contested frontiers, one where the Christians (through the Maronite Church) and the Shiites (through Hezbollah-affiliated real estate developers) are struggling over land locally and through global networks of finance, fundraising, and religious allegiances, and where this struggle is transforming Hayy Madi/Mar Mikhail into a sectarian frontier in times of peace. Chapter 3: The Lacework of Zoning chapter abstractThis chapter traces how urban planning and zoning technologies have become technologies of warfare in times of peace, transforming Sahra Choueifat, a southeastern periphery of Beirut, into a deadly frontier of contestation and violence. The territorial battle of Hezbollah and the PSP over the area through zoning policies and real estate and housing markets is resulting in what this chapter calls the lacework of zoning. This low-income periphery is now a patchwork of apartment buildings that are in the vicinity of industries that are next to one of the most active urban agricultural areas around Beirut, with severe repercussions on the everyday life of area residents. The chapter describes how areas known to be Hezbollah's spaces in Beirut are in fact produced by the continuities and discontinuities of neoliberal practices with practices of religious affiliation, sectarian constructions, service provision, resistance ideologies, and militarization. Chapter 4: A Ballooning Frontier chapter abstractThis chapter shows how access to development sites and individual project characteristics