Unanswered Threats : Political Constraints on the Balance of Power

Why have states throughout history regularly underestimated dangers to their survival? Why have some states been able to mobilize their material resources effectively to balance against threats, while others have not been able to do so? The phenomenon of "underbalancing" is a common but woefully underexamined behavior in international politics. Underbalancing occurs when states fail to recognize dangerous threats, choose not to react to them, or respond in paltry and imprudent ways. It is a response that directly contradicts the core prediction of structural realism's balance-of-power theory - that states motivated to survive as autonomous entities are coherent actors that, when confronted by dangerous threats, act to restore the disrupted balance by creating alliances or increasing their military capabilities, or, in some cases, a combination of both.