Energy is a resurgent topic in geography and cognate fields, but its theoretical development and empirical exploration have been uneven. I argue that centering transmission as an analytical lens — rather than treating it as incidental to extraction, generation, and consumption — brings the multi-scalar spatial politics of energy systems into the foreground through attention to circulation. This article reviews work on transmission from energy geographies, science and technology studies, and the histories of energy, technology, and the environment, identifying four main themes. First, transmission is used as a lens to examine larger energy metabolisms and how the circulation of electricity entrenches spatial relations. Second, transmission is an instrument of state territorialization, both within and across borders. Third, transmission, as a particular form of electricity capital, is subject to specific regimes of accumulation and regulation. Finally, transmission lines can become objects of social contestation that entangle multi-scalar politics of energy transition, electrification, and development. The article concludes by identifying areas for further research — empirical, theoretical, and policy-oriented — through which scholarly attention to transmission can inform energy geographies, energy studies, and human-environment geography more broadly.
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