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More evidence is surfacing to suggest that the lapita people were a different race than the Polynesians, infact there is little to suggest they were the polynesians ancestors. So they couldn't have created an empire, the lapita were around at a different time than the Polynesians.
The vast expanse of ocean prevented an empire from forming.
The battle at Tours, France led by Charlemagne (I think it was Charlemagne) prevented Islamic expansion.
The Ottoman Empire's military defeats in the Second Siege of Vienna and the naval Battle of Lepanto prevented further Ottoman expansion.
The Romans profited from their empire through developing thriving trading networks and through taxation.
The areas of ocean between land.
More evidence is surfacing to suggest that the lapita people were a different race than the Polynesians, infact there is little to suggest they were the polynesians ancestors. So they couldn't have created an empire, the lapita were around at a different time than the Polynesians.
The vast expansion of the ocean
The vast expanse of ocean prevented an empire from forming.
The main reason the Hausa did not develop a large empire was due to their fragmented political structure. The region consisted of several city-states that were often in conflict with each other, which hindered the ability to unify and expand into a single empire. Additionally, external factors such as the Fulani jihad in the 19th century further prevented the establishment of a Hausa empire.
The battle at Tours, France led by Charlemagne (I think it was Charlemagne) prevented Islamic expansion.
The Romans profited from their empire through developing thriving trading networks and through taxation.
The Byzantine Empire and the Kingdom of France jointly prevented the Muslims from overrunning the European side of the Mediterranean.
The Ottoman Empire's military defeats in the Second Siege of Vienna and the naval Battle of Lepanto prevented further Ottoman expansion.
It is the Assyrian and Babylonian Empire which is in Mesopotamia (which is currently Iraq) hope that helped
The Romans profited from their empire through developing thriving trading networks and through taxation.
It could be argued that the Roman Empire has never fallen because its influence still remains with us even today.