Anecdote is not the singular of data, but I have a hypothesis. I have a circle of friends that involve people making six figures. They will NEVER get married. One guy will not even let women in his condo. Having watched a few people we know get divorce raped, and dealing with three of them sucking on a firearm in the aftermath, I'm wondering how many men my age and younger are looking at the risks of marriage and saying "No Fucking Way." Prenups in the USA are worthless and not worth the legal fees of setting them up and family courts hate fathers. Nobody gets married thinking that they are getting divorced, and not all marriages fail etc but that fear is there. I'd be curious to see if anyone has done any studies on the impact of the courts and divorce law on marriage rates.As I understand it, once the researchers came to this point, they basically said, "welp, we have no idea what changed but culture is different" and they're not wrong.