The Scriptures clearly state that National Boundaries are intended and established by the Creator.
Acts 17:26 26 and He made from one man every nation of mankind to live on all the face of the earth, having determined their appointed times and the boundaries of their habitation,
Notice that besides appointed lands, each nation also has "their appointed time". So it is important to align with the Creator's Plan for each nation in each time period in history.
Gen 10:32 32 These are the families of the sons of Noah, according to their genealogies, by their nations; and out of these the nations were separated on the earth after the flood.
Deut 32:8 8 "When the Most High gave the nations their inheritance, When He separated the sons of man, He set the boundaries of the peoples According to the number of the sons of Israel.
Notice that God's Plan required choosing one nation to start with as an example of His Way of Life... whose prosperity and blessings would act as an incentive for the rest of the nations to follow. This is why their land borders and time period had priority... it was not because they were a superior people. These people were SLAVES!
Deut 7:7-8 7 "The LORD did not set His love on you nor choose you because you were more in number than any of the peoples, for you were the fewest of all peoples, 8 but because the LORD loved you and kept the oath which He swore to your forefathers, the LORD brought you out by a mighty hand and redeemed you from the house of slavery, from the hand of Pharaoh king of Egypt.