Is it ever morally okay to punish people? To punish someone is to hurt them because of a wrong they’ve already committed—whether or not any future benefit will come of that hurt. How could it be okay to deliberately hurt someone?

Driverless cars promise to make driving safer. Biut with the inevitability of accidents, who is to blame for the harm caused by them? Does responsibility lie with the car manufacturers, or must we simply accept that we cannot sometimes accidents will happen?