5.8K views · 15 reactions | We know Earth is about 4.54 billion years old. But how do you measure the age of a country? For this list, we looked at places with a documented history of government, as well as large, organized civilizations within areas similar to the boundaries of present-day countries. Historians don't typically agree on a single "oldest country," but each nation on this list is a strong contender. | Howstuffworks | Facebook