Earlier quoted context omitted.
I don't think you need to run any experiment. Being married or not is just signing a paper. What matters is if the couple live together and in harmony. You can do so without being married and having children, and it's everyday more common. That's why I'm saying you have cause and effect in the wrong order: children issues are tied to one or both parents not caring about them, and a symptom of that was having children…
> Being married or not is just signing a paper. If we ignore almost all of human history save for the past 50 years, then yes. If we redefine marriage to not mean what most humans that have ever used the word meant by it, then yes. But why would we do these things? If you call all relations between two human beings marriage, you gain nothing, you just lose a word. Marriage is a covenant between two people, a man and…
50 years ago was 1975.
I'm pretty sure there are examples of formalized marriage about as old as historic records.