How fair is the race/IQ theory?

Some scientists claim that race and IQ is related and that since negroids have smaller 
brains they must
have a small IQ level but since most humans can use a tiny portion of their brain, the 
size probably has 
nothing to do with it.

But have there been any other reasons why scientists claim that race and IQ are 
related? does it have 
something do with social science? or is it deeper?

[moderator's argh: Oh, goddam argh. Can we please take this stuff
to an appropriate forum, like sci.anthropology? (I am astonished
to find there's no sci.sociology forum!) Human IQ and race are so
ridiculously species-constrained that they have zero interest as
regards evolution as a process. Get OVER yourselves. - JAH]