The aim of this dissertation is to examine the life and literature of the Scottish-American naturalist John Muir to determine if Muir's concept of environmental stewardship is consistent with orthodox Judeo-Christian belief and/or if Muir offers an original contribution to theologically-informed environmental ethics. By examining John Muir's legacy from a theologically-informed linear perspective in the fields of internationally protected wilderness initiatives, environmental advocacy organisations, cinematography as a new environmental ethical arena, and cultural debates concerning nature-deficit disorders and the resulting impact on future environmental stewardship, this assessment will suggest the consequences of separating Muir's contemporary legacy of environmental activism from its theologically-informed inception.