A theory that states that if at the present days the married males divorce remarry easily
It's not my theory but I'm familiar with it. It states that if nowadays the already married men divorce than they can't remarry again easily. The arguments are that when these men married (for example 10-15 years ago) the females weren't as picky as they're today. For example, before there were those women who were happy to find an average looking man who is loving them, who is able to write poems, to take some care for himself and for the family and that was almost all, but now such kind of man is seen as a "good but not enough" male or "not good at all".
There are some experiments that show for example a married man who thinks that at the present it's easy to get a date but when he tries, he realizes that there isn't even one woman who is liking him.
What I think about it?
1. It's true that most of the married males, especially those who don't follow the present trends are not familiar how pickier are the present females than the ones from their marriage time generation.
2. Yes, some of them will be not able to remarry at all. And it'll be not exactly because the nowadays females are pickier but because during the marriage these males stopped take any care of their looks and they got fatter, less masculine, less muscular, etc. They also lost their abilities to communicate with different females.
Don't forget that not everyone wants to remarry after a marriage; some of them are going to be volcels.
3. No, not all of them will be single forever; most of them are going to be noncels especially those who have got the qualities that are valued nowadays -- good-looking, rich, suitable personality, etc. Even the average ones are not going to be incels because it's easy for them to remarry a single mother with kid/kids, a woman from a very poor country, a much older woman, etc., i. e. if they aren't some standardcels.
My conclusion: the theory is mostly true.