In The Militarization and Weaponization of Space, Matthew Mowthorpe diligently analyzes the military space policies of the United States, the Soviet Union/Russia, and the Peoples Republic of China from the Cold War period to the present day. Mowthorpe focuses on the development of the ballistic missile defense and other anti-satellite systems and aptly assesses to what degree space will become armed. This work cogently addresses an issue of increasing urgency to scholars of international politics.