Each country has to be able to develop efficient economic policy, facilitating sustainable economic development of national economy. In order to devise such policy, development patterns of a country have to be known, external threats indicated and various scenarios of their impact has to be foreseen, their impact forecasted and discussed (Tvaronavičienė, 2018). Conflicts within the environment of international relations, whether these are domestic or interstate, have become one of the most intensely perceived security problems of the contemporary world. Their nature is usually violent, accompanied by human casualties, which may escalate to humanitarian crises and may cause enormous material, population and ecological damage. Regions in conflict are the source of population migration, increasing pressure and they become a suitable environment for the formation of radical and terrorist groups. The destructive force of conflicts causes an economic decline of countries and, thus, increases the differences between stable regions and countries and those regions and countries with ongoing conflicts. The resolution and prevention of conflicts within international relations is a multidisciplinary approach, which draws on psychology, sociology, mass communication, development studies, studies of international institutions and political science, security studies and, in particular, on the study of international relations. In this contribution we present proposal of conflict resolution approaches due to the smart sustainability in the content of social systems, especially in international relations.

The prosperity and development of human civilization and the sustainable growth of individuals, social groups and states have never been more strongly dependent on national and international security than in today's dynamically changing and globally interconnected world. For this reason, security research plays a significant role in the development of human society as a whole, especially in these turbulent and changing times, characterized by the global and regional security environment crisis and by increasing tensions in international relations. What does this development and its perception mean for one of the primary functions of the modern state, which is to ensure its security and the safety of its citizens, and what is the impact on research in this area? Following this, the development of the methodology of political science in the context of the development of the very concept of security is the subject of the presented discussion, a study in which, using appropriate methods of applied scientific research, we rely primarily on security science theory and theory of international relations. The methodology presented by us is based on a heuristic approach in research in political science (international relations). At the same time, it represents an analysis, synthesis and comparison of possible starting points processed in theoretical studies and practical constructs of authors who reflect the concept of security from the system theories' point of view. At the same time, the study's authors aim to open a discussion on new hypotheses and possible scenarios for the future development of political and security science.

The paper attempts to highlight of the security crisis measures of internal and external of diplomatic mission before or after exposure of risk. Diplomatic missions represent their country, as an authority and an entity, concerning their diplomatic obligations towards the receiving State. The mission may be exposed to natural events such as earthquakes and floods or manmade events such as breaking thru a location for causing terrorism and electronic espionage. The employees, on their various levels and job positions, devotion to work and loyalty to their country, are the secret of their success in achieving the mission security. Security comes from the inside before being achieved from the outside. Working within a one-team-spirit increases the preparations for facing risk plus the incessant coordination with the receiving State governmental departments for reporting to them about any potential emergency that may occur. This increases the mutual trust between the mission of the guest country and the receiving State in crisis management. The evaluation of maintaining security success is a reflection to the receiving State power, the velocity and wisdom of the procedures taken by the mission of the guest country.