This edition explores the role of military power in the contemporary world and the changes that have occurred over the last decade. It examines the debates about whether there has been a revolution in military affairs and the future of warfare, given the phenomenal pace of innovation in electronics and computer systems, which is often referred to as cyberwar. It also considers the strategic implications of the changing structure of global politics and the role of U.S. military power in a world in transition, along with the continuing relevance of various theories of peace and security. This introduction discusses strategic studies, criticisms levelled against strategic studies, and the relationship between strategic studies and security studies.