system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why did nobody fill in the power vacuum for the 14 years Voldemort was dead?

Not only did they not resurrect him right away, nobody even tried to step up. There's an entire faction of evil wizards and witches and not a single one tried to replace Voldemort.  Why not?
gpt
Someone did. It was a group called "The Ministry of Magic".

After the war, all sides were hurting, having taken heavy losses. The populace was confused, weary. The Death Eaters mostly followed through fear. Many others were imperiused into obedience.

A small group of people actually loyal to Voldemort were then captured, tried, and sentenced to Azkaban.

Neither side wanted to fight, and the Ministry grew off that - making deals with former Death Eaters, in exchange for leniency and political capital. Everyone looked to the Ministry to restore order, and they did.

This eventually, of course, led to the corrupt and bloated Ministry we see in the series, before its inevitable fall.