It was the Boomers who bought into it, buttressed it, and spread it. Some earlier generation may have created it (invented) but they were few. Too many of the early Boom bought it and spread it like wildfire - they “innovated” it and that is more important than invention.
Then blame the boomers for the Army, the republican party, the NRA and any other organization that gains new members as the years go by.
If you want to know what destroyed America look at the legislation and court decisions before the 1980s, and organizations like the ACLU, NOW, NEA, the Communist party, congressional black caucas, etc.