Life is a journey. When people's paths intersect, they may lock together and continue indefinitely, or they may diverge after some amount of time in parallel.
I believe that marriages in earlier generations were more permanent and stable because the majority of people married very young, finished maturing together, and because life was much simpler and more difficult (ie the majority of time and energy devoted to mere survival) stayed the course without hardly even considering alternatives.
Today, few people marry before they are fully mature, with their own courses much better established, and modern life has made life so much easier that not only are alternatives more abundant, but they are far easier to take advantage of.
Or ... back then things were made to last, and if something (including a marriage) started to break, you'd do your best to fix it.
These days everything, including people, is disposable.
I've always said there are too many people
And the economy as is, is only designed to promote growth..
But earth is a limited container..
Instead of making M0re people, we should pour every penny we have into interstellar travel..
AND/OR Artificial intelligence..
AI replaces humanity's Meat-sac children..
The Machine race are our prodigy regardless of composition.. They are born of our intellect, our labor, our love..