Redefining concepts of nation and national security and establishing their models for the new era

To meet the new needs of global and national governance and to provide the fundamental theory for national security studies, the concepts of nation and national security urgently needs to be updated and developed because new things and problems that go beyond the meanings of traditional concepts of nation and national security are constantly emerging over the world and in the international relationships driven by globalization and disruptive high-tech. This study adopts methods such as literature review, historical analysis, inductive analysis, logical reasoning, and systematic thinking to conduct in-depth to investigate the concepts of nation and national security. By summarizing traditional concepts of nation and national security and their historical evolution, their shortcomings were analyzed. The impact of globalization and technological revolution on traditional concepts of nation and national security and the need for renewal of these concepts were explained. Based on the approach of system thinking and the reality of integration of the artificial space, social space, biological space, information space, natural space and cosmic space, a six-dimension space integration concept of nation which is embedded in the world and its model were proposed. Then, based on the new concept of nation and the model, a corresponding concept of national security including the artificial space, social space, biological space, information space, natural space and cosmic space and its model were proposed. The research results show that the new concepts of nation and national security and their models have made up for the deficiencies of traditional concepts of nation and national security. Also these new concepts can cover new things and problems emerging in today's world, can adapt to the development trend of the future world, can provide directional guidance for global and national governance, and have important theoretical value and practical significance.