How is the monroe doctrine an example of diplomatic nationalism

The Monroe Doctrine, which was enacted on December 2, 1823, is an example of nineteenth-century nationalism. According to the Monroe Doctrine, any further interference by European countries with states or efforts to colonize land in the Americas would be considered an act of aggression. The doctrine went on to say that the US would not come close within existing European countries or meddle in their internal affairs and that the Western Hemisphere was no longer open for business.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

china is shifting toward specialization in industry and services and away from agriculture.

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