Every nation relies on its own “common sense” which means prudent and reasonable policy towards other nations through the lenses of its own security and safety. For every nation, it is “reasonable” to protect itself, it is ‘reasonable” to defend itself, it is “reasonable” to fight against poor governance, etc. If something is of primary importance for a nation, it becomes an obligation. In this case, “common sense” becomes an obligation of a nation to go to war, if something threatens its happiness. “Common sense” means, as stated in the United States’ Declaration of Independence, “to institute a new government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their safety and happiness.”
Refutation of Oppositional Views
Opponents may argue a nation has no right, neither political nor moral, to go to war in order to avert possible danger. They may point out that if all nations refrained from going to war, there would be no wars at all, but harsh reality differs greatly from idealistic beliefs in righteousness. If we take into account historical events and the present day situation in the world, it is possible to say a nation has a right to go to war to protect its citizens from external and internal threats or possible interventions which threaten its existence and unity.