That was kinda my starting point purnell, though I'll admit to having found out a few things I didn't previously know as this thread has progressed, particularly with regards to physiological differences in brain structures.

Nevertheless, I still find the original post idiotic. Not because of the subject matter or the assertion, I wouldn't restrict anything from intelligent debate, and this is a pretty interesting subject. But offensive because of the insulting and racially denegrating way his view was expressed.

On the issue of IQ, there seem to be a number of contradictory facts floating about, but there's enough evidence that some kind of claim about a racial factor in IQ can be reasonable. That said, there are a lot of other factors outside of race involved in this, a lot of mixed views in research from what I can tell, and every evidence that the recorded gap is closing (for whatever reason). On top of which, low intelligence was only one of a number of charges Phil made. The others were poor coping skills, aggression and anti-social behaviour. All of which are anecdotal and/or based on fuzzy statistics where race is only one of a score of variables. Mainly it's offensive because the OP presents himself as just plain not liking blacks.