The milder forms of nationalism have been among the most benevolent of human creations. Nations are communities of millions of strangers who don’t really know each other. For example, I don’t know the eight million people who share my Israeli citizenship. But thanks to nationalism, we can all care about one another and cooperate effectively. This is very good. Some people, like John Lennon, imagine that without nationalism, the world will be a peaceful paradise. But far more likely, without nationalism, we would have been living in tribal chaos. If you look today at the most prosperous and peaceful countries in the world, countries like Sweden and Switzerland and Japan, you will see that they have a very strong sense of nationalism. In contrast, countries that lack a strong sense of nationalism, like Congo and Somalia and Afghanistan, tend to be violent and poor.