To answer this question, I think we should look at more everyday instances of cruelty or violence, like road rage. On one reading, that familiar phenomenon fits perfectly with the theory that abusive behavior happens between people when there’s a breakdown of empathy. After all, we’re all driving around in our little metal boxes, separated from one another, and so we often fail to recognize each other’s humanity. So when someone cuts you off, boom! That’s when the abuse begins.