This study is anchored on Balance of power and emphasizes on its relevance in the contemporary international system. This study seeks to investigate the prominence of balance of power at ensuring avoiding war only applying war as an instrument of ensuring peace as the last result. Is it still relevant, is it even in operation as a practice and not just a theory in recent times. These are the questions this study aims at probing and unveiling. The study explored the history of balance of power, concepts of balance of power, levels of balance of power and eventually, it examined its relevance in the contemporary international system.