Given that dwarfs and elves are few in number, might it have occurred to them to subvert the supernumerous humans by indulging their passions, followed by guilt blackmail? How well do they understand their invaders by now? And if this is a credible plot line, which kin would be the most likely to try it? Dwarfs seem to have a systematic, means-for-ends approach going for them. Elves have their deep understanding of natural processes. Would either find the idea of Illuminatism a la Weishaupt too revolting to attempt it?
It goes without saying that this could go terribly wrong.