Why did the Eastern half of the Roman Empire last longer than the Western half of the Roman Empire?

The Eastern region had a denser population and more economic activity, also Rome had many conflicting political parties. ... The Alps, a mountiness region, prevented the Byzantine Empire from expanding North.

Explanation:

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

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