Introduction: "When we started working on the issue entitled “The Total Defence 21st century. COM – building a resilient society”, we did not know then how topical this issue would become. We were aware of its importance, especially since 2014, which was the beginning of the Russian aggression against Ukraine. However, we did not think that the need to build an effective concept of total/comprehensive defence, and then its implementation, would become so pressing in February 2022. Two of the three general regularities in the history of international relations have also become extremely topical. We are talking about the clash between imperial and polyarchic tendencies, and nations’ desire to express their independence and identity, and as a result, to have their own state. It can be assumed that in order to achieve this goal, as well as for small and medium-sized states to be able to defend themselves against the forces of empires and effectively deter them, they must use the concept of total/comprehensive defence, in its improved, 21st century version."(...)