Answer:
Eastern parts were richer and more populated, while western part had a symbolic value (Rome). All in all, western half collapsed quickly and doesn't have great impact on history. Eastern half is the Byzantine empire, which had a great impact on eastern Europe, it basically "created" Bulgarian, Serbian and Russian empires (of which only Russian managed to survive long enough to become a world force) and (Byzantine ) had a great influence on Ottoman empire.
hope this helps ;)
Explanation:
