Arthur C. Brooks explains that contempt, not anger, predicts divorce. Contempt is an ice-cold blend of anger and disgust that treats your partner as worthless. Eye-rolling during arguments is a strong signal of relationship trouble.
Anger and divorce are uncorrelated. What's correlated with divorce is contempt, which is a complex emotion that mixes anger and disgust. And so when you have anger and disgust, it's an ice cold, very complex emotion where you treat somebody as if they were worthless. You and your girlfriend are having a big argument, you and your wife, whatever, having a big argument, and she rolls her eyes at something you say, that's a huge predictor of disillusion of the relationship that expresses contempt. Anger is no problem. Anger says, I care what you think and I want it to change. It's passion.
