You should learn to read the links. Irving Kristol defined the word Neocon. He was a card-carrying member of the Trotskyite faction of the Communist Party when at New York University. When he quit the Communist Party, he came up with a plan for a new kind of Conservative, and defined the word "Neoconservative". This was many years before PNAC was even around. Neoconservatives were in the Reagan administration, but Reagan kept them at arms length. Bush Sr, while VP in the Reagan administration, referred to the Neocons as "the crazies in the basement". Again, this was during the 1980's. PNAC did not exist then.