Smouldering resentments of many kinds can turn to rage and even gleeful destruction. If long-term power is addictive, short-term power can be intoxicating.

Some of the systems in the U.S. — financial, educational, political, medical — are so imbalanced in power that the powerless are beginning to rebel, and in destructive ways, while many of the powerful and even the well-off don’t seem to understand why.