Under what theory? Disparate racial impact? Before I get downvotes for that it is worth noting that racial groups do have remarkably different IQ test results

Under what theory? Disparate racial impact? Before I get downvotes for that it is worth noting that racial groups do have remarkably different IQ test results in the US. Whether that says anything about intelligence or genetics is hotly debated in some circles. It isn't clear how much is cultural, whether there are subtle cognitive differences between racial groups, and even of so whether this corresponds to any intelligence difference.