That's an open-ended question which I don't have many existing public resources to address - but thanks for your interest. Very briefly:

• I like evolution, Yukdowsky seems to dislike it. Ethically, Yukdowsky is an intellectual descendant of Huxley, while I see myself as thinking more along the lines of Kropotkin.

• Yukdowsky seems to like evolutionary psychology. So far evolutionary psychology has only really looked at human universals. To take understanding of the mind further, it is necessary to move to a framework of gene-meme coevolution. Evolutionary psychology is politically correct - through not examining huamn differences - but is scientifically very limited in what it can say, because of the significance of cultural transmission on human behaviour.

• Yudkowsky likes utilitarianism. I view utilitarianism largely as a pretty unrealistic ethical philosophy adopted by ethical philosophers for signalling reasons.

• Yukdowsky is an ethical philosopher - and seems to be on a mission to persuade people that giving control a machine that aggregates their preferences will be OK. I don't have a similar axe to grind.