The concept that a man can even “cheat” on his wife is a modern idea.

It violates the agreement he had with his wife. Modern expectations are that you do not commit infidelity.

He created a stable environment to have and raise his children and to provide for them and to contribute to his society. It’s not his fault he happens to live in a particular era where it’s otherwise not possible to do that unless you enter into some contrived modern notion of marriage where otherwise in previous eras there would be no issue.

Just to be clear, fertility rates in the developed world are nearly universally below replacement so there are various norms in place that are clearly not compatible with life.

Fertility is very well studied and the causes of low/high fertility are well known throughout the modern era. Sub-replacement is a very modern concept, coming with the normalization of contraception and dual income households, not with moving from polygamy to monogamy.

Likewise you keep stating elsewhere some "modern notion" of infidelity. There is nothing modern about it. Men came under the same classification with the spread of Christianity through Europe and those societies didn't all crumble and wither away. Even among the elite, the bastard children had very significant challenges in their rights and were not seen as coequals to their peers borne from the monogamous unions.

I don't know if you are an LLM or a bot, but even a cursory look at history would really help, instead of your flat-earther like approach throughout these threads.

No, the cause of low fertility is not “well known”. We can safely entirely dismiss what you’re saying because of this statement.

You know what else is a "modern idea"? That you can't sleep with a 12 year old and that you can't own slaves. Both were considered normal for most of human history. So I guess they're ok too, by your logic?

`monideas` is a bot. You're wasting your time and mental energy even paying attention to this.