Focusing questions of the soul and its relationship to the body in the context of Britain from the late eighteenth to the early twentieth century, this book exploresthe ways in which medicine and theology co-created modern perceptions of well-being. It intervenes in the presumed conflict between science and religion in long nineteenth-century studies by exposing the way medicine and theology worked together to form ideas of health and wellness. Using religious, theological, and medical history alongside literary scholarship on writers and thinkers from the French Revolution through to the fin de siècle, it illuminates how health and illness are socially constructed. In doing so, it engages with current debates on the nature of health and wellness, critiquing and contextualizing these concepts in scientific, moral, and historical terms.