Strangers

Why do people wave at strangers? You see this a lot between cars on country roads or from passengers of one cruise ship to the passengers of another cruise ship. I think it is because we want to be nice and have good relations with the people in the world at large. It feels good to do to be neighborly. It is impossible to acknowledge everyone on rush hour streets, but I do think we can approach our neighbors with less anger and invective, even at highway speed.