In my family it was definately related to a number of factors. While fortunately there was no violence (physically) my mother was abusive emotionally. For her in the late 1960's getting married was about the only way to escape her life in a rural southern town with no prospects or a woman to do anything with her life. Her father was an alcoholic and verbally abusive, (eventually he died in a drunk driving accident) Unfortunately the life she married into was one of a career army officers wife.
My father who had just come back from 2 tours in Viet Nam (one as a member of the 5th special forces and one as an Army Aviator with the 101st airborne) wanted to have a normal 2.3 kids and a dog life after the horrors of war. Like my mother he had an alcoholic father who instead of being abusive left him at the age of 10, the only time he ever contacted my father again was on his death bed in Florida, by then it was too late.
So you have two people, victims of emotional abuse and trauma getting married who should not have. The stress of one child barely added to the formula at all. In fact they both said after the fact that I was the one thing that they never regretted about being married.
The whole thing worked pretty well untill I was 16 and pretty much raised. Then my mother left. Walked out one night without a word and the next time she came back it was for half. Half my fathers retirement, half my college fund, a car that my father had to pay the insurence on, and the cats, but not me.
Definately not monocausational at all.
Part of the problem is that society still has a stigma about divorce that makes it wrong for people that discover they hate each other to split up. Part of the problem is that people are frivilous when they marry, focusing on sex, and not building a relationship. Part of the problem is money or the lack of it, which has been proven by better margins to be a more reliable contributing factor to divorce. 95% of all divorces in the first 3 years of marriage are at least partially caused by money problems.
I guess the problem for me with the whole thing is saying you found a cause and then blaming the victims, claiming they are the cause. The article smacks of ones about rape victims, you know the ones where because the victim was dressed attractively or provocatively she "asked for it".