Tell them to plan on emigrating to a country with an emerging economy and to study Spanish or Chinese. Explain the downside of expending public resources on wars. Explain that war is a mechanism for moving money from the public sector to the private, and that war starts when someone in a powerful position decides that war will help them make money, and that one war will cause another war, and still more money can be made. But not everyone will make a lot of money, only a few will. And many people will end up dead, so they won't need money, and that leaves more money for those that don't fight in the war. Use Switzerland as an example of what happens to an economy in a country that avoids war. Tell them to respect other cultures and to treat others as they would want to be treated, and that if everyone does that, the economy will be just fine, and their won't be any wars. Then explain that everyone is not doing that, and that is why the economy is not doing very well, and there are wars. And because there are wars a few people are getting very rich, but many more are getting poorer.