system
Given the following post, respond as if you're commenting on Reddit:
human
Which of the basic forces of nature is the strongest?

A few years ago my physics-chemistry teacher asked my class which of the 4 basic forces of nature was the strongest. I answered Gravity because of black holes. They are gravity at its maximum, and them being the most powerful things in the universe, it made sense to me that gravity would also be the strongest. However he corrected me and said it was actually the strong nuclear force the most powerful and that gravity was actually the weakest. 

So my question is: if strong and weak nuclear forces are technically more powerful than gravity, how can neutron stars come to exist? How can gravity overcome nuclear forces and start fusing the atoms in the core of the stars together in ways that are not "natural"?

(I only know the very basics of what happens to create a neutron star, so if I'm saying something wrong, please feel free to correct me)
gpt
Yes, your teacher is correct.

The reason why gravity seems to be the strongest over large length scales is that the strong and weak forces have very short ranges (~ 10^(-15) and 10^(-18) meters, respectively), and electrostatic forces tend to cancel each other out when you have material that is macroscopically neutrally charged.

So for material which extends over a large region of space, and has no net charge, gravity tends to dominate. That's why gravity is a very important force for astronomy/astrophysics/cosmology, but it's totally irrelevant for things like atomic/nuclear physics.