Haven't read it, will look it up. What do you mean by "family unit"? Do you have kids? If so, read on.
I have been thinking about this TONS since discovering my husband's affair last week. He and I are absolutely devoted to our 5 year old. Neither can imagine inflicting the kind of pain on him that our separation would entail. Really, really sensitive only kid (wanted more, couldn't), no extended family. Even worse - father from one continent, mother from another. Daddy ain't going to be living around the corner, in other words.
I really believe after thinking and reading about this a lot that it can - often - be worth sticking together for the kids. Sounds so passe, and you would never have heard me saying this before I had my son. But I saw this study and even though studies can reach a multitude of different conclusions, this one clicked with my gut feeling now: www.utexas.edu/features/2006/divorce/index.html
Obviously, like the study says it is pointless for everyone to stick together if either parent is so unhappy that they can not be a good parent or if there is persistent conflict in front of the children (and I don't yet know if that is something I can avoid in my marriage). But barring those (many) cases, I think that at a VERY MINIMUM while a low conflict marriage is not ideal for kids, it can often be better than the alternative and the total loss of mental security that it implies. My own parents' marriage has been far from ideal, for example, but there it is, after 43 years, and even though we don't get on fantastically the mental security it provides for me is really significant. My home is still there, whatever happens. I don't know HOW I would be feeling now if it wasn't.
Once you accept, as I sort of do, that it's worth staying together for the kids, then it also gives you the incentive/motivation to work on making it so much more than that. Of course I don't WANT to be in a so-so marriage (though I could do it for my son's long term well-being). So I am going to try and work on it being a great marriage, too. Wish me luck because I am going to need it - I am very hurt and bitter right now. And good luck to yourself, too.
Gawd, I don't arf go on!