This is the (long) period of British history where the main political & rhetorical battleground was the protestant reformation. Milton himself was a convert, as were many (most?) notable Englishmen his generation. Divorce was a primary/defining point of contention between catholics & protestants.
I feel like there's not enough context here, to get an understanding of what being pro-divorce means in his time & place.
How does that happen?
> marriages that should end in divorce for the benefit of both parties don't due to financial hardships.
The Sunken Cost Fallacy. It's a cruel -- and common -- steady-state among married people.
It makes no sense to gamble that ten years from now two people will be the same and want the same things. People change. You might reach the SCF steady-state, but you might also be stuck with a wretch or a lunatic.
Having children gives the SCF steady-state even more inertia.
If kids enter the equation, the cost of divorce is the differential between what it ACTUALLY costs to support the kid, and what you'd be paying in mandatory child support (many states like 30% salary after taxes.) That could mean a huge wealth transfer from the one without custody to the one with, with no change in resources spent on the child.
If my wife and I ever split, I would much prefer to stay estranged while being half responsible for the kid, to being divorced paying 30% of my salary for no fucking reason beyond that's what some bean counter decided is the cost of the child.
[1] https://www.biblegateway.com/passage/?search=Matthew+19%3A1-...
[2] http://www.instonebrewer.com/DivorceRemarriage/Articles/Whit...