Recent scholarship on religion and energy highlights the religious attachments some groups of people form with fossil fuels that have served to facilitate their extraction and use in building socially and economically stratified worlds. This scholarship foregrounds the business owners, managers, scientists, inventors, industrial spokespersons, and other panegyrists of the beneficent, civilizing power of coal and oil. However, little research to date has examined the religious attachments formed with fossil fuels by those who mined them, labored with machines powered by them, and lived in places that were diminished to extract, burn, and waste them. This article builds on the work of Andreas Malm and Terra Schwerin Rowe to examine these “critical carbon theologies”. It focuses in particular on the theological themes in popular literature produced by the nineteenth-century British Chartist movement—the first great social movement led by those who experienced in their bodies, communities, and environments the traumas that accompanied the introduction of fossil fuels as a motive power. These Chartist activist-theologians condemned coal power as a demonic force in history and envisioned a way to exorcize an industrializing society of its demons. This article uncovers and evaluates the largely overlooked theological dimensions of this movement and applies them toward a consideration of the ethics of energy transition today.