Why do you choose the term of seventy years?
The CIA is not that old.
The US began its first propaganda ministry in the Woodrow Wilson administration in 1912. Mitchell Palmer was the inventor of propaganda in the modern era. Palmer managed to whip up all manner of hate against the Germans as the "Huns". The main reason for the US getting into WWI was that JP Morgan knew that if the Brits lost, they would never pay him the money he had lent them, of course. The US had no logical reason to fight WWI. The largest immigrant population in the US at the time were Germans, most of whom were pacifists who had flred German militarism from the 1700's through the Bismarck period. They certainly wanted no part of any war, not against Germany nor for the US or anyone else. But within a few years, Palmer managed to get the German language rfemoved from the curriculum of most highschools, and a huge numnbers of Germans changed their named, the Schmmits becoming Smiths, the Mullers becoming Millers, the Schneiders becoming Taylors and so on.
The US invented modern advertising, British ads tended toward the dumbass "none genuine without this signature" crap, but the creating of an image for a product, like Quaker oats (which was never sold by Quakers) and phony experts like Betty Crocker and Aunt Jemima became the essence of advertising, and Palmer was the father of propaganda.
The Germans in the 1920's admired the US, which has=d made so many of their peasants into successes. Hitler admired the Pennsylvania Turnpike, the Model T, and Palmers propaganda, and the German versions of these, the Autobahns, the VW and Goebbels Ministry of Propaganda were the new, improved German versions of this.
The Germans managed to surpass the Brits through science, and a strict meritocracy in education. The Brits preferred to graduate upper-class twits who would meet up with a few geniuses in College, but the German system relied more on science.
Torture was always used in human history, but the Germans applied scientific principles to it. Goebbels was himself no scientist, and Nazi science was often way off the track, but then the US invented the OSS, patterned after Britis intelligence, but with more smart people and fewer twits than the Brits used, and a more German meritocratic bent. The OSS contacts with the French and Italian criminal element were instrumental in the French connection and the European end of the modern Mafia. IT provided organizational skills the dummies in the criminal element did not possess.
Propaganda and covert operations have a similar goal: to defeat an enemy with stealth rather than force of arms, by weasly wile rather than expensive brontosaurian muscle. I would say that this began around 1915, in the US.
Arab terrorism was simply an extension and a third world duplication of the failed French attempts to keep Algeria part of Metropolitan France. Of course, there were some terrorists in North Africa trained by the OSS as well.
