I got to thinking. There are four forces in the universe - gravity, electromagnetism, the weak force, and the strong force. Gravity dominates large-scale action, electromagnetism dominates chemical and biological reactions, the strong force binds nuclei together, and the weak force mediates nuclear reactions like fission and fusion.
The theory of the early universe is that these forces were bound. Electromagnetic forces and weak forces were bound together in the electroweak force, and the binding of the electroweak force with the strong forces were GUTs, or grand unified theories. At even higher temperatures, GUT force and gravity had merged into a single superforce, governing the behavior of everything, also known as superstrings. As temperatures cooled, these forces split off from another. At 10 to the -43 of a second, gravity split off from the other forces, which were still merged as GUTs. At 10 to the -38 of a second, the strong force froze out from the GUT force, leaving 3 forces operating in the universe: Gravity, the strong force, and the electroweak force. At 10 to the -10 of a second, all forces split apart into what they are today.
My theory is that, since the universe is 3 K temperature now, and assuming it doesn’t re-collapse, it’ll inevitably reach zero. At this point, I theorize a fifth force will split from gravity, the substance we know as “dark matter,” which accounts for 98% of the universe’s mass. Any thoughts?