So what is forbidden to study in the context of idolatry?

Its modes of worship, in order to use them. But if there is wisdom or ideas or concepts, there is no barrier to studying them. Also, studying its modes of worship as part of studying culture or history is not forbidden.

It says, “And the Lord saw that Leah was hated, and He opened her womb…”

By meant I mean in an evolutionary and rational sense.
Thank you very much

I didn’t understand what that verse is supposed to say. The question is what this hatred means. About that I wrote what I wrote.

I don’t know what it means to be “meant,” neither evolutionarily nor rationally. I don’t understand the question. In my opinion, you don’t understand it either.

If I understood your question correctly, regarding whether a person is meant for only one woman from an evolutionary standpoint,
and the issue of whether monogamy (remaining faithful to one partner) is evolutionary or cultural, as far as I know it is only a cultural matter. Evolutionarily, it would have been preferable for a man to have more women so that there would be greater reproduction and more offspring. By the way, among chimpanzees there is no monogamy, and that is further evidence that this is a cultural matter.
Also, see the book “The Myth of Monogamy.”

Benny, I don’t think this is a matter of knowledge. The laws of evolution would tell you that if that is what happened, then it is probably the most evolutionarily successful. One can offer very many explanations for this, and yours can be challenged in many ways.