Nebuchadnezzar II defeated the Egyptians and their allies the Assyrians at Carchemish subdued Palestine and the region of Syria consolidating power he controlled all of the trade routes from Mesopotamia to the Persian Gulf to the Mediterranean Sea
With all of the tolls and taxes he gathered in creating a city in which he hoped would be one of the wonders of the world
In the forty three years of his rein he made most of the time employing a vast army of slave labor to surround his city with walls so thick that chariot races were conducted on the top which was 56 miles
Schools and temples were plentiful and literacy, mathematics and craftsmanship flourished along with a tolerance of the interest in other gods and other faith
He is portrayed in unflattering light in the Bible mostly notably in the Book of Daniel and the Book of Jeremiah ( where he is seen as the "enemy of God" and one whom the deity of the Israelites intends to make an example of, or conversely the agent of God used as a scourge against the faithless followers of YahWeh, the form of a Hebrew name of God used in the Bible
Those portraits not withstanding Nebuchadnezzar II was most certainly responsible for the so called the Babylonian Exile of the Jews and so for the formation of the modern day Judaism ( in that the temple destroyed the Priestly class of the Levites of the Jews had to recreate their religion "in a foreign land" as recounted famously in Psalm 137 from the Bible and elsewhere