Rape is not specific to humans, so it can’t be purely cultural; where else would it come from, if not genes?
It only “comes from genes” in the same sense that eating, having a liver, and breathing oxygen “come from genes”.
Eating, having a liver, and breathing oxygen are inherited, but have zero heritability (since they do not vary). They cannot be selected for or against.
Even something that does vary from one person to another (some people commit rape and some do not) and “comes from genes” in this trivial sense may have zero heritability. If it is not heritable, your suggested policy of killing the offspring of rape will have no eugenic effect, and nor will any other policy of trying to breed the behaviour out of the population.
It only “comes from genes” in the same sense that eating, having a liver, and breathing oxygen “come from genes”.
Eating, having a liver, and breathing oxygen are inherited, but have zero heritability (since they do not vary). They cannot be selected for or against.
Even something that does vary from one person to another (some people commit rape and some do not) and “comes from genes” in this trivial sense may have zero heritability. If it is not heritable, your suggested policy of killing the offspring of rape will have no eugenic effect, and nor will any other policy of trying to breed the behaviour out of the population.