Two very critical ideas he introduced like a virus into the political give-and-take. Firstly, he word 'enemy', clearly dividing society into adversarial hostility over rigid ideologies where politics should entail uniting to cooperate and compromise for the best possible outcomes for the most people. The other was Ridicule, the 5th rule. Describing it he says it's super-powerful because it's irrational. In that, he injects irrationality into an activity that is concerned with life and death decisions of polity and law. Greater mischief has no man committed, I think. Of course, many in the radical Right also draw inspiration from this shit, but they are the sort who having no root in themselves are drawn to 'whatever works'.