A memorandum from the President of the United States on December 9, 2020 explains this document: MEMORANDUM FOR THE VICE PRESIDENTTHE SECRETARY OF STATETHE SECRETARY OF DEFENSETHE ATTORNEY GENERALTHE SECRETARY OF THE INTERIORTHE SECRETARY OF COMMERCETHE SECRETARY OF TRANSPORTATIONTHE SECRETARY OF ENERGYTHE SECRETARY OF HOMELAND SECURITYTHE DIRECTOR OF THE OFFICE OF MANAGEMENT AND BUDGETTHE DIRECTOR OF NATIONAL INTELLIGENCETHE ASSISTANT TO THE PRESIDENT FOR NATIONAL SECURITY AFFAIRSTHE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATIONTHE DIRECTOR OF THE OFFICE OF SCIENCE AND TECHNOLOGY POLICYTHE CHAIRMAN OF THE JOINT CHIEFS OF STAFFSUBJECT: The National Space PolicySection 1. References. This directive supersedes Presidential Policy Directive - 4 (June 29, 2010) and references, promotes, and reemphasizes the following policy directives and memoranda: a) Presidential Policy Directive 26 - National Space Transportation Policy (November 21, 2013)b) Executive Order 13803 - Reviving the National Space Council (June 30, 2017)c) Space Policy Directive 1 - Reinvigorating America's Human Space Exploration Program (December 11, 2017)d) The National Space Strategy (March 23, 2018)e) Space Policy Directive 2 - Streamlining Regulations on Commercial Use of Space (May 24, 2018)f) Space Policy Directive 3 - National Space Traffic Management Policy (June 18, 2018)g) Space Policy Directive 4 - Establishment of the United States Space Force (February 19, 2019)h) National Security Presidential Memorandum 20 - Launch of Spacecraft Containing Space Nuclear Systems (August 20, 2019)i) Executive Order 13906 - Amending Executive Order 13803 - Reviving the National Space Council (February 13, 2020)j) Executive Order 13905 - Strengthening National Resilience Through Responsible Use of Positioning, Navigation, and Timing Services (February 12, 2020)k) Executive Order 13914 - Encouraging International Support for the Recovery and Use of Space Resources (April 6, 2020)l) Space Policy Directive 5 - Cybersecurity Principles for Space Systems (September 4, 2020)It is, in other words, a vitally important planning documen

As civil space policies and programs have evolved, the geopolitical environment has changed dramatically. Although the U.S. space program was originally driven in large part by competition with the Soviet Union, the nation now finds itself in a post-Cold War world in which many nations have established, or are aspiring to develop, independent space capabilities. Furthermore discoveries from developments in the first 50 years of the space age have led to an explosion of scientific and engineering knowledge and practical applications of space technology. The private sector has also been developing, fielding, and expanding the commercial use of space-based technology and systems. Recognizing the new national and international context for space activities, America's Future in Space is meant to advise the nation on key goals and critical issues in 21st century U.S. civil space policy.

Space Security involves the use of space (in particular communication, navigation, earth observation, and electronic intelligence satellites) for military and security purposes on earth and also the maintenance of space (in particular the earth orbits) as safe and secure areas for conducting peaceful activities. The two aspects can be summarized as "space for security on earth" and “the safeguarding of space for peaceful endeavors.” The Handbook will provide a sophisticated, cutting-edge resource on the space security policy portfolio and the associated assets, assisting fellow members of the global space community and other interested policy-making and academic audiences in keeping abreast of the current and future directions of this vital dimension of international space policy. The debate on coordinated space security measures, including relevant 'Transparency and Confidence-Building Measures,' remains at a relatively early stage of development. The book offers a comprehensive description of the various components of space security and how these challenges are being addressed today. It will also provide a number of recommendations concerning how best to advance this space policy area, given the often competing objectives of the world's major space-faring nations. The critical role to be played by the United States and Europe as an intermediary and "middle diplomat" in promoting sustainable norms of behavior for space will likewise be highlighted. In providing a global and coherent analytical approach to space security today, the Handbook focuses on four areas that together define the entire space security area: policies, technologies, applications, and programs. This structure will assure the overall view of the subject from its political to its technical aspects. Internationally recognized experts in each of the above fields contribute, with their analytical synthesis assured by the section editors.