This seminar is a critical introduction to the history and historiography of energy, a field entangled with the history of fossil-fueled climate change. We will work our way back into the history of energy, using theories of energy to rethink such key issues as industrialization, labor, empire, and urbanization. In the process, we will rethink stark distinctions between socialism and capitalism; bodies and environment; nature and culture. And we will pay particular attention to the edges of the field: where are the opportunities for new work? What new questions does a focus on energy allow us to ask?