The Founders envisioned these United States to be more like Switzerland. Not to interfere in other nation's affairs, not entering into any foreign alliances and entanglements. But still having a strong navy.
U.S. Grant wrote that it was a lie that the Mexican Army attacked us in 1846, but it was used as an excuse to provoke the Mexican-American War.
The Maine blew up due to a problem in the coal bunker, but it was used as an excuse to invade Cuba, Puerto Rico, and the Philippines.
The US also got involved in the rebellion in Panama to get rights to build a canal across it.
Wilson sold munitions to Great Britain and put them on passenger vessels to provoke the Germans to use unrestricted submarine warfare. Thus launching the US into World War I. then he tried to get us into the League of Nations. Don't forget that the population of the US at the time was mostly pro-German, but media propaganda was used to favor the British.
FDR moved the Pacific BB Fleet from San Francisco to Pearl Harbor to provoke a Japanese response (plus his embargoes). This launched the US into WW2. Then he formed the United Nations.
And the list goes on.
I am not an isolationist, but I think we may have been better served by not being interventionists.
Now admittedly, communism is a big problem in the post-WW2 era, but maybe the Nazis and Stalinist might have collapsed from continued warfare. The Japanese Empire may have been a problem, too. OK. The US would have gotten drawn into it anyway.
I disagree with Congressman Paul that we should just pull out overnight. we still need a strong Air Force and Navy. But we certainly could look at ways to slowly pull back.
Alot of what tonantius says is true. Americas past is strewn with excuses to declare war. Look at Bush's invasion of Iraq, the "theme" was to find and disable weapons of mass destruction. Then when no WMD's were found, the "theme" became regime change. Same with Afghanistan, Osama Bin Ladin was in Pakistan. Sun Tzu's writings state that "all war is based on deception" and this is true.
I have stated this before and I will state it again, the U.S. invaded Iraq to secure the worlds fourth largest known oil reserves and we invaded Afghanistan to secure the future route of a large natural gas pipeline.
U.S. war policy is a sort of an international eminent domain action. Do business with us our way, or face military might! As the British have been known to say "The Americans will eventually get it right."
I will summarize this posting by saying, we will in the future have to elect a national leader with vision. Someone who is proactive and selfless, not someone who is out playing golf while our military is risking their lives for us.
*Disclaimer "Above statement is an educated opinion and not the official view of the U.S. Government"