But you are right divorce rates vary, for instance decreasing post covid. I was thinking on the century scale. But also percentage of people entering stable commitment, and so even the possibility of divorce is much lower
> "The share of children born outside of marriage has increased substantially in almost all OECD countries"
This seems like it's unrelated to divorce.
I don't think it's fair to look at divorces on a century basis given that no fault divorce only became possible in the United States in 1969 - before that you needed to prove there was some sort of abuse or infidelity involved.
It certainly becomes more complicated to try and draw trends, and impossible to assume it was stronger family value that held them together before that point - in fact, the peak in the early 70s indicates that once it became possible it was used with gusto.
"The share of children born outside of marriage has increased substantially in almost all OECD countries"
https://ourworldindata.org/marriages-and-divorces
But you are right divorce rates vary, for instance decreasing post covid. I was thinking on the century scale. But also percentage of people entering stable commitment, and so even the possibility of divorce is much lower