American politicians are fond of telling their audiences that the United States is the greatest country in the world. Is there any evidence for this claim?

Well, yes. When it comes to violence and preparations for violence, the United States is, indeed, No. 1. In 2013, according to a report by the Stockholm International Peace Research Institute, the U.S. government accounted for 37 percent of world military expenditures, putting it far ahead of all other nations.