They divorce because women nowadays don't have to be "serving" a man in order to survive.
And no, i am not a feminist, this is a fact. If a woman can have her own job, her own income, her own career, her own fandom, and can get half the man's money, why would she tolerate a miserable marriage?
The age of women tolerating abusive husbands is over. They can do without them now.
If Islam takes over the west due to higher birthrates. Then it might reverse. I mean just compare the population growth between Greece and Turkey.
There is also the possibility that the economic system might collapse internally because women don't have enough children because they are educated and there will be no one left to pay for the pensions.