Does anyone actually believe this stuff? I've seen arguments for them, but neither I nor anyone I've talked to seems to find them very convincing.
Yeah, psychological egoism more or less corresponds with evolutionary psychology, as long as it's recognised to be very subtle, and certain considerations are taken into account (eg, how being a social animal affects what "selfless" is) it looks pretty convincing.
I'd remove the "only" from the Ethical Egoism definition, put in always some self interest instead, and again the same re-evaluation of "self-interested" within context is needed.
I don't think these are meant as theories of advice on how we should behave btw, just commentaries on aspects of how we
do behave.