How did nebuchadnezzar make babylonia the leading state in western asia?

Nebuchadnezzar (the king of Babylonia) after the fall of the Assyrian empire make Babylonia the leading state in Western Asia by creating it as the center of the empire. He gave Babylonia the status as one of the great cities of the world.  He founded a city which was not only wondrous but also a center of intellectual pursuits and arts.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.