Prof. Ryszard Zięba is a full professor emeritus of international relations and security studies at the University of Warsaw, Poland. He has been a member of the Commission of National Security Strategic Review established by the President of the Republic of Poland, an expert of the Polish Parliament, the Ministry of Foreign Affairs, the Ministry of Regional Development, the National Security Bureau, and was awarded a Jean Monnet Chair by the European Commission. He is author of over 400 other research studies on: international security, Poland’s and EU’s foreign and security policy, the theory of international relations and security studies. The last two books he published in Springer are: The Euro-Atlantic Security System in the 21st Century: From Cooperation to Crisis (2018) and Poland’s Foreign and Security Policy: Problems of Compatibility with the Changing International Order (2020).