Okay, could you show it? In particular, while you can point to something like the g-factor, can you show that the g-factor exists? It is currently completely hypothetical that such differences exist.

For a good example of evidence, look at the Flynn effect. One way to read the effect is that people dramatically got smarter over the past century, but...how? What exactly actually changed? The biggest correlate is education, suggesting that the quality of schooling is far more important than any innate ability.

Edit: Ah, you believe in IQ. I presume that you won't simply let me win the argument just because of my high IQ, though? So IQ isn't everything. More importantly, though, note that IQ also correlates with sex and skin color, but a cursory look at the genes says that that correlation must be spurious. So indeed what we see is that IQ actually correlates with quality of education, which then goes on to correlate with both sex and skin color thanks to the sexism and racism inherent in our educational system.