Four Fundamental Forces of Nature
range
strength
force
infinite
1
GRAVITY

infinite
1042
ELECTROMAGNETIC

subatomic
1044
STRONG

subatomic
1038
WEAK
Gravity is one of 4 fundamental forces of nature. By fundamental we mean that so far, we've never seen any phenomenon that couldn't be explained by one of these 4 forces. The energy released by fusion in the form of light is due to another fundamental force, the electromagnetic force. And the process of fusion requires the other 2 fundamental forces which work only in the subatomic realm, the weak force and the strong force.

The life and death of stars requires all 4 of these. In stars that are a lot more massive than our sun, it comes down to a fight to the death between the force of gravity and the strong force —– a David and Goliath story. You might be surprised who wins.