All manner of IQ tests have been thought up to correct perceived cultural and racial bias, but the worldwide results, which I am not going to post here, appear to be much the same for races, where ever they have been brought up. On average Chinese and Japanese get the best results , Caucasians next who you know who at the bottom. While it's fine to say that the you know who's are generally superior physically and excel at many sports such as athletics, to say they are just not as bright due to genetics only results in the old racism mud slinging. It's thought now that the lack of Neanderthal DNA in the you know who's is far more to blame than the usual excuses of poverty/racism/slavery.