A non-neglible probability on the chance that sexual relations with between children and adults aren't necessarily as harmful as they may seem.

That's probably the case. In western societies, it's an orthodoxy, a moral fashion, to say that sex between children/adolescents and adults is bad. This can be clearly seen because people who argue against the orthodoxy are not criticised for being wrong, but condemned for being bad.

That within human races there are probably genetically-determined differences in intelligence and temperment, and that these differences partically explain differences in wealth between nations. (Caveat: "race" is at least as much a socially-constructed term as a scientifically valid category; however there are diffences in allele frequency that reliably correlate with having ancestors from particular parts of the world).

That these differences may have been partically caused by the fact that peoples from different parts of the world have had literate societies for different times.