The author constructs a theory of sustainable leadership in contrast to exploitive leadership and argues that all leadership in the modern world falls somewhere on a continuum between these two extremes. The definitions developed for sustainable and exploitive leadership hinge upon the purposes toward which leadership is applied. The concept of sustainable leadership is further defined by exploring its authentic, inclusive, and developmental applications within society. The author concludes that sustainable leadership serves an integrative role of applying human agency toward creating/restoring the health of the human/natural world and that, therefore, the concept of sustainable leadership is highly relevant to both sustainability educators and society at large.