system
Given the following post, respond as if you're commenting on Reddit:
human
Is the expansion of the Universe considered a "force"? 

I understand that there are fundamental forces governing the Universe, but what about the fact that it's expanding? How it that taken into account?
gpt
No, it is not.

The whole "fundamental forces" notion is, to put it bluntly, a lie we tell children. It's not actually a very good description of reality.

To the extent that metric expansion is a consequence of anything one might be inclined to think of as a "fundamental force," it's gravity.