Is There a Difference in Mean IQ Between Races?

The most controversial area of the book is in your discussion around the mean difference across races in population IQ. There's been some interesting tidbits that I've been fascinated by, but the science in the bell curve was extremely conservative. We are also within a matter of years before we will understand the functioning of intelligence down at the level of alleles and single nucleotide polymorphisms. Genetically, I think most of the picture will have been filled in by 2025.