It's worse than that. If the goal of marriage is simply to stay together (rather than, say, to stay together and for it to actually be beneficial for those inv

It's worse than that. If the goal of marriage is simply to stay together (rather than, say, to stay together and for it to actually be beneficial for those involved) then yes 60% of marriages are failures and 40% success. But if the goal is more ambitious, then at least 60% of marriages are failures. Maybe the remaining 40% stay together for religious reasons, a misplaced sense of pride, for the benefit of children rather than spouses, etc. I'm not so cynical to say 100% of marriages "fail" in this sense, but I'd wage it's a lot higher than 60%. And you might be a lot more worried about those marriages that fall into the "stayed together but bad" category, as they'll include abusive and exploitative relationships.