Getting married is one of the most important decisions you make in your life, so the stakes are too high to leave to your love-crazed judgment. Yet most people fall in love, get engaged and tie the knot. The problem is that men and women make this crucial decision when they are consumed with desire and passion. Something must surely be missing in the process, as more than half of the marriages in the U.S. end up in divorce. Could the missing element be a dose of rationality and clarity?