Boogie Monster, I really do not like psychologists/psychiatrists and esp not their tests. I think that eventually sciences like evolutionary biology and neuroscience will make psychology obsolete. At least to a very large extent. Something that I am very skeptical about are personality and IQ tests.
And that question has to a large extent been answered by evolutionary biology, game theory, etc. We're inherently self-interested (not necessarily selfish), and that self-interest frequently translates into various altruistic behaviours in both human and non-human animals.
Thank you Jacques I really like your post. I agree with this and it is something that I want to learn more about *and it is hard science* wich I like even more.
Very interesting responses again great forum that makes a person think!
Superman