3. Denmark
Years of independence: 1048
On the third place on our list of the oldest countries and nations in the world is Denmark with a total population of 5 million people. Danish people are considered to be among the happiest ones in the world. They enjoy a high standard of living and high values concerning education, health care, protection of civil liberties and democratic governance. Also, Denmark is known for having the highest social mobility rank on the global level.
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