This book offers an overview of space strategy in the 21st century. The purpose of space strategy is to coordinate, integrate, and prioritize space activities across security, commercial, and civil sectors. Without strategy, space activities continue to provide value, but it becomes difficult to identify and execute long-term programs and projects and to optimize the use of space for security, economic, civil, and environmental ends. Strategy is essential for all these ends since dependence on, and use of, space is accelerating globally and space is integrated in the fabric of activities across all sectors and uses. This volume identifies a number of areas of concern pertinent to the development of national space strategy, including: intellectual foundations; political challenges; international cooperation and space governance; space assurance and political, organizational, and management aspects specific to security space strategy. The contributing authors expand their focus beyond that of the United States, and explore and analyse the international developments and implications of national space strategies of Russia, China, Europe, Japan, India, Israel, and Brazil. This book will be of much interest to students of space power and politics, strategic studies, foreign policy and International Relations in general.