Secret to an everlasting marriage

One possible reason for the rising divorce rate is that it used to be the done thing to marry before living together and having kids. This meant that couples could not truly know eachother before marriage and then came the inevitable changes that occur after having children. Now that marriage is no longer essential (after all, 'living in sin' was a notion created by the Victorians as common law marriages were common place before that) relationships may have more chance of lasting.