We respond to two commentaries about our recent paper on molecular biology and human intelligence. They rightly point out the complexities involved, especially from polygenicity and gene X environmental interactions. Our view is that these factors do not negate an underlying biology of intelligence that can be accessible by advances in genetic and neuroscience technologies and analytic methods. We see the complexities as inspiring challenges that can be addressed rather than permanent roadblocks that discourage research.
Gargus et al. (2026) studied this question.