There are two types of models of physical laws that govern aspects of the universe: the Standard Model and the Unified Theory. The standard model was pretty good for the observable world, but there are things it can't explain or predict and when looking at a higher dimension the model breaks. To fill this gap, the physicist established the unified theory; the name indicated that it unified the knowledge of existence into a single theory. Contributors to this field include Albert Einstein, Steven Weinberg, Sheldon Glashow, and other modern scientists. The three types of unified theory discussed in this article are unified field theory, grand unification theory, and theory of everything; each with its own level of unification. The first fundamental force was electromagnetism created by English mathematician James Clerk Maxwell in the mid-19th century. Electricity has positive and negative charges; the force becomes weaker the farther away you go from the source and stronger the closer you get. Magnetism works the same way with the north and south poles. At first, early physicists considered these two forces to be two distinct phenomena. Then, during a demonstration, HC Oersted, a Danish scientist, noticed that electrical currents were moving the needle of a nearby compass. Other scientists began to wonder if a magnet could also create electricity, and Michael Faraway proved that this was the case in a classic experiment, where a moving magnet produced electric currents. Faraway wanted to develop the new effects, but his lack of mathematics became an obstacle. Then, in the middle of the 19th century, James Maxwell, after reading Faraway's work, decided to translate it into mathematical language and succeeded. Maxwell worked on the equation of electromagnetic waves and middle of paper ...... without success) was trained and refused; then it was revised – from electromagnetism, gravity, electroweak, GUT and TOE. The path to a unified theory led scientists to believe that the hot, dense universe before the Big Bang was simple, containing only a single fundamental force and a single elementary particle. The GUT is more within the reach of the human sciences to achieve this, but the TOE is far too far beyond. Technology will improve and perhaps one day scientists will discover some of the predicted elementary particles, or even the so-called “supersymmetry” effect. In conclusion, modern and future physicists continue their quest for a unified theory that could explain every natural phenomenon and predict all possible consequences. A successful theory of everything can allow humans to learn about every mysterious aspect of the universe, from ancient times to an unknown future..