The Infinite War Paradox

Looking back on our relatively short existence as a country it seems as though there has hardly ever been a generation that has not seen its own war. What if I were to say that we're currently involved in one of the strangest periods of peace in our history? Even since the end of the second World War, in which the United States emerged along with the Soviet Union as one of only a few viable global super-powers we have taken an increasingly active role in world affairs from the Korean and Vietnam Wars to Grenada, Panama, and the seemingly endless fighting in the Near East. However, following the declaration of war in Korea, we have not declared war on any of the struggles we've participated in, and this seems like a bind. How is it that we're constantly fighting people for one reason or another, and yet we've not declared war in generations?
For starters, the Vietnam war saw rise to the War Powers Resolution, a piece of legislature that required the President to communicate with Congress prior to initiating military action in a region, and to withdraw military personnel from fighting regions after 60 days if no declaration of war is made. Arguments abound for and against the legislature - some argue it takes away power granted to the President by the Article Two of the Constitution, however some argue that it leaves the President with too much power over declaring action. The primary issue is that since the legislature (passed over President Nixon's veto by two-thirds majority) The U.S. has not actually declared war on anyone, but rather preferred either indirect methods of intervention - ie as in Iran-Contra, indirect support of our allies - or limiting our physical involvement to 'advising roles' - as is the case in much of our action in the Middle East.
What I argue is that we've reached a state of paradox - because the United States is always 'at war,' we are never actually at war. This can be clearly connected through examining the sorts of engagements we have taken place in since the Korean War, which seem to suggest that rather than the world reaching a sort of unprecedented era of peace, the definition of what a war is has changed, rather.