Once you've lost something (I think sooner or later, Iran will succeed in sinking a big US ship) then even if you cant win, you also cant leave else its an admission of defeat - so it drags on and on and on.
Sinking or even just seriously damaging a U.S. aircraft carrier — approx. 5K people in crew + airwing, billions of dollars in ship and aircraft — might trigger a Pearl-Harbor or 9/11 fury among the American public. No U.S. president could get away with even a "proportionate" response, let alone doing nothing.
Think of the Tonkin Gulf incident in 1965, which led to the U.S.'s widened involvement in Vietnam on the basis of grossly-distorted reports about alleged attacks — which never happened — on U.S. destroyers (which are comparatively small ships). [0] If Iran were to actually sink a U.S. aircraft carrier, then Trump-Hegseth-Miller might well nuke Tehran in response.
We sure as hell don't need anything like the assassination of Archduke Franz Ferdinand in Sarajevo in 1914 by a terrorist. It triggered a cascade of some of the stupidest and costliest government decisions in history. Belgrade, Vienna, St. Petersburg, Berlin, Paris, London, they all effed it up almost beyond belief. WWI cost millions of lives and untold billions in resources that could have been put to far better use. Iran sinking a U.S. carrier could be a similar trigger.
Eh. WWI wasn't an accident, a series of unfortunate incidents, or something that just got out of hand.
Countries and people WANTED the war, war was still thought about as a general benefit to the country, almost sporting. Everybody was feeling powerful with the new capabilities industrialization gave them and they wanted to use that to gain influence. (of course not literally everybody, but this was a prevailing force)
The implication here I'm disagreeing with is that the war was the unintended consequence of mistakes. Instead of mistakes leading the continent down a dark path it was intentional, just waiting for an excuse to start fighting.
That was true among some of the players in various governments — Kaiser Wilhelm being a prime example. Can you cite any (reputable) historians who think that was a general attitude?
Again: Catastropic naïveté.
(one of many sources of this kind of information)