President Truman created the CIA.
He explained that it was solely an attempt to consolidate intelligence from many different intelligence agencies (page 285):
I needed … the President needed at that time a central organization that would bring all the various intelligence reports we were getting in those days, and there must have been a dozen of them, maybe more, bring them all into one organization so that the President would get one report on what was going on in various parts of the world. Now that made sense, and that's why I went ahead and set up what they called the Central Intelligence Agency.But in the 1970s, he told his biographer, Merle Miller (page 285):
I think [creation of the CIA] was a mistake. And if I'd know what was going to happen, I never would have done it.
Why, they've got an organization over there in Virginia now that is practically the equal of the Pentagon in many ways. And I think I've told you, one Pentagon is one too many.
Now, as nearly as I can make out, those fellows in the CIA don't just report on wars and the like, they go out and make their own, and there's nobody to keep track of what they're up to.