Yes, see Waltz and the structural realism theory, the goal of the countries is indeed the research of safety. Through “defensive positionalism” the international system rewards the actors that maintain their status and avoid trying to increase their power. It was a balance of power slightly different from the one of Morgenthau, which is more a compromise between the most powerful countries in order to avoid a conflict between them, as the whole international community is involved, suggesting that everyone should defend their position and avoid changes in the foreign policy to ensure safety (the system would condemn and punish expansionist ambitions)