There are also a lot of studies that show that children who grew up in families where the parents did not get divorced, but who did not model loving behavior for their children, end up pretty farked up, mentally and emotionally.
As far as I know, no one here has chosen divorce without trying many other ways to keep the marriage intact.
It's not always in the best interests of the kids to stay in a loveless marriage. Plenty of adult children are burdened with the guilt of knowing that their parents stayed in these emotional black holes of marriages just "for the kids." There is no "one size fits all" solution.
