Some believe an ideal marriage is where the husband provides and the wife takes care of the kids and the home. They might believe this is the way marriage is designed to be, and that it is the way it has always been; except it's not, and it has never been.
Like any sitcom or romantic comedy will tell you, love complicates things. History will tell you that love and these complications are the reason for the increase in divorce, but it wasn’t always like this. In fact for the majority of human history love didn’t complicate marriage because it wasn’t a major factor for getting married in the first place.