Unified field theory, the deep study of only one part of the material energy known as the "gross material energy". Modern science still have not discover subtle material energy or sub-space where 90% of material universes, including other living entities exist.

Unified field theory, the deep study of only one part of the material energy known as the "gross material energy".

In physics, a unified field theory (UFT) is a type of field theory that allows all that is usually thought of as fundamental forces and elementary particles to be written in terms of a pair of physical and virtual fields.

According to the modern discoveries in physics, forces are not transmitted directly between interacting objects, but instead are described and interrupted by intermediary entities called fields.

Classically, however, a duality of the fields is combined into a single physical field within the realm of gross material matter.

For over a century, unified field theory remains an open line of research and the term was coined by Albert Einstein, who attempted to unify his general theory of relativity with electromagnetism .

However, his reseach from a higher level of knowledge, is severely restricted to just the gross material realm.

Even the Large Hadron Collider can only percieve "gross matter" also and CANNOT detect "subtle matter" in Sub-space because anything made of "gross matter" cannot detect subtle matter.

This is also why life outside this Earth planet is difficult to find, this is because all the higher and lower planetary systems, all exist in sub-space

This is because they are made of "subtle matter" which is NOT percievable or detected by "gross matter" like our biological material bodily vessels and all gross material technology related around it.

The "Theory of Everything" therefore is NOT "Everything" because it does NOT reveal the vast number of "subtle worlds" and then the "higher spiritual anti-material perpetual realities" that exist known as Vaikuntha and Goloka Vrindavana.

On the gross material limited level, the "Theory of Everything" and "Grand Unified Theory"  are closely related to unified field theory, but differ by not requiring the basis of nature to be fields, and often by attempting to explain the physical constants of "gross material nature" only.

Earlier primitive attempts based on classical physics are described in the article on classical unified field theories.

The goal of a unified field theory has led to a great deal of progress for future theoretical physics on the "gross material level only" and progress continues in the realm of gross material energy but still modern science are yet to discover subtle matter or sub-space.