Yes, the goal of modern theoretical physics is to develop a single theory that unifies all the fundamental forces of nature. This pursuit is often referred to as the "Theory of Everything" or "Grand Unified Theory" (GUT). The four known fundamental forces are gravity, electromagnetism, the weak nuclear force, and the strong nuclear force.
Currently, the most successful framework for unifying three of these forces—electromagnetism, the weak nuclear force, and the strong nuclear force—is the Standard Model of particle physics. The Standard Model describes these forces and their interactions through the exchange of particles called gauge bosons. However, gravity, described by Einstein's general theory of relativity, does not fit into the framework of the Standard Model.
Efforts to unify gravity with the other three forces have led to various proposed theories, such as string theory, supergravity, and loop quantum gravity. String theory, in particular, has gained significant attention as a potential candidate for a Theory of Everything. It postulates that fundamental particles are not point-like entities but rather tiny vibrating strings. String theory incorporates gravity within its framework, offering the possibility of a unified description of all the fundamental forces.
However, it's important to note that finding a complete and experimentally confirmed theory of everything remains a significant challenge. The energy scales and conditions required to test these theories are far beyond our current technological capabilities. Nevertheless, researchers continue to explore and develop theoretical frameworks in the hope of ultimately unifying all the fundamental forces into a single, comprehensive theory.