Case
The horror, the horror
My high school history class says Pearl Harbor is an invention of Right Wing Warmongers or left winged isolationalists
In 1941 the left wingers were the warmongers and the right wingers were isolationists (broadly speaking).

There are two major problems with the claim that the carriers were sent to sea 'to keep them safe'.
Firstly, in 1941 the USN (and the very traditionally minded [in this case] FDR) considered battleships to be far more important then carriers. As such, if any ships were to be sent to sea for 'safe keeping' it would have been the 'war-winning' battleships, and not the carriers.
Secondly, if the carriers were at sea for 'safe-keeping', then the USN was totally incompetant. On the 7th of December all the carriers were individually sailing into the central Pacific [towards Japan!] under light escort. Had the Japanese stumbled across an American flat-top they would have had little problem sinking it.
Personally, I see the Pearl Harbour conspircy as the last vestige of the pre-war attitudes towards the Japanese. It seems that some people still can't accept the fact that Americans were outsmarted and out-fought by the Japanese, and have to resort to pathetic claims that the USN was stabbed in the back by Roosevelt.