This is in contrast to military studies, which has as its aim on the efficient attainment of victory in conflicts, primarily by violent means to the satisfaction of one or more, but not all, parties involved. Disciplines involved may include philosophy, political science, geography, economics, psychology, sociology, international relations, history, anthropology, religious studies, and gender studies, as well as a variety of others. Relevant sub-disciplines of such fields, such as peace economics, may be regarded as belonging to peace and conflict studies also.