system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] Where did all the Dwarves go after the Fourth Age?

We know the Fourth Age will bring the dominion of Men. And most Elves have passed to the West. So what about Dwarves? What did they become? Do we know anything?
gpt
They died out. Low birth rates, internal strife (often due to the Rings), and war against the forces of darkness doomed the Dwarves to the point of such a small population that surviving was impossible.