The Succession Problem That Unraveled Everything
After Nebuchadnezzar’s death, the throne passed through a rapid and destabilizing series of rulers. In just over two decades, five kings came and went — some deposed, some assassinated. Political violence and court intrigue became the norm rather than the exception. This kind of instability at the top had consequences that radiated throughout Babylonian society. Administrative decisions stalled. Military loyalty became uncertain. The priesthood, which had been a reliable partner to Nebuchadnezzar, grew skeptical of rulers who could be removed without warning. By the time Nabonidus seized power in 556 B.C.E., the imperial machinery was already under strain, and he would do very little to ease it.
Nabonidus Made One Critical Error
Nabonidus was an unusual ruler by any measure. An antiquarian obsessed with ancient religious sites, he devoted considerable energy to restoring old temples and promoting the moon god Sin above all other deities — including Marduk, the patron god of Babylon and the centerpiece of its religious identity. This was not a minor theological disagreement. In Babylonian culture, the king’s relationship with Marduk was central to his legitimacy. The annual New Year festival, the Akitu, required the king to physically clasp the hands of Marduk’s statue to renew his divine mandate. Nabonidus neglected this ritual for years at a stretch. To the Babylonian priesthood and the population they influenced, this was a profound failure of kingship — not just offensive, but destabilizing in ways that eroded popular confidence in the regime.
He Left the City to His Son
Making matters worse, Nabonidus spent roughly a decade away from Babylon, residing at the Arabian oasis of Tayma while leaving his son Belshazzar to govern the capital as regent. The Nabonidus Chronicle, a Babylonian administrative text, records this extended absence matter-of-factly, which itself suggests how normalized the dysfunction had become. Belshazzar held real authority during this period, but he lacked his father’s title and the full weight of royal legitimacy. This split in leadership created ambiguity at exactly the moment when Babylon needed clarity. The Hebrew Bible’s account of Belshazzar’s feast — where sacred vessels looted from Jerusalem’s temple were used for a royal banquet — captures something historians recognize in the broader record: a ruling class that had grown dangerously disconnected from the expectations of those it governed.
