I’m the first to despair over those from my country of birth never thinking about travel beyond their country’s borders, but there are reasons behind it you may not have considered. — “I don’t know what you’ve been up to, but I lived in 4 different countries by the time I was your age,” a German friend scoffed at me when I was 25. Indeed, to most Americans, the idea of living in 4 countries before 25 would be extremely impressive. Of…