The work even explains these traits in a way that might look familiar to a modern psychologist. The wealthy and powerful indulge their children and give them no training in overcoming indignities. “The one to whom nothing was refused,” Seneca writes, “whose tears were always wiped away by an anxious mother, will not abide being offended.” The ability to laugh, he suggests, is an antidote to the petulance that comes with privilege.

