The acts of the Creation generated an entire world with a host of nations and geographical environments. Each of the narrative accounts however focus on a sliver of land, usually the land lived in by the author / authors of the narrative.

The author's purpose in centering in and focusing the tale around one specific country may simply reflect the fact that for primitive people born, living, and dying on one specific part of earth, this was all they knew. For people in those days, the world was their country, and their country was the world. It was all they knew. They didn't have the advanced technology that we have to travel around or see greater parts of the world. They may have known their neighboring nations at best, or countries that they encountered on their relatively limited voyages. This was still, however, within a circumscribed very limited perimeter of geographical space. Creation myths, therefore, centered almost entirely on their nation.

Conclusion

Each country had...

For ancient people, the world often was their own country. That (and their neighboring countries) was all they knew. It was the focus of their existence. It therefore made sense that the Deity had been preoccupied with their birth.
Sources

May, Herbert G. editor, the New Oxford Annotated Bible: New York, Oxford University Press

The Four Creations, 1987; Online

http://www.gly.uga.edu/railsback/CS/CSFourCreations.html

Philippi, Donald L. trans., the Masks of God: Oriental Mythology: New York, Viking Press, 1969

Radhakrishnan, S (editor and translator), the Principal Upanisads: New York, Harper and Brothers Publishers: 1953

Walls J & Walls Y (translators and editors), Classical Chinese Myths: Hong Kong, Joint Publishing Company, 1984,