The Unified Field Theory is sometimes called the Theory of Everything (TOE, for short): the long-sought means of tying together all known phenomena to explain the nature and behaviour of all matter and energy in existence. The advantage of a unified theory over many fragmented theories is that a unified theory often offers a more elegant explanation of data , and may point towards future areas of study as well as predict natures laws. Quoting Prof. Stephen Hawking from his book 'A Brief History of Time', we read one important warning: "..if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists..". Unfortunately, the chances that mainstream knowledge will ever lead us to such a theory are getting smaller and smaller. Tesla had already warned us: "Today´s scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality." Lack of experimental work has always been the main issue, with scientists preferring to discard experimental results which disagree with their theories, than the other way round. Today, we find these discarded results under the name of 'scientific anomalies', which are usually kept off from mainstream literature, or really hard to spot.
In physics, a field refers to an area under the influence of some force, such as gravity or electricity, for example. A unified field theory would reconcile seemingly incompatible aspects of various field theories, to create a single comprehensive set of equations. Such a theory could potentially unlock all the secrets of nature and make a myriad of wonders possible, including such benefits as new machine concepts and inexhaustible sources of clean energy, among many others.
For example, in 1861-65 James Maxwell Clerk explained the interrelation of electric and magnetic fields in his unified theory of electromagnetism. Then, in 1881-84 Hertz demonstrated that radio waves and light were both electromagnetic waves, as predicted by Maxwell's theory. Early in the 20th century, Albert Einstein's general theory of relativity - dealing with gravitation - became the second field theory. The term unified field theory was coined by Einstein, who was attempting to prove that electromagnetism and gravity were different manifestations of a single fundamental field. Regretably, Einstein failed in this ultimate goal. When quantum theory entered the picture, the puzzle became more complex. The theory of relativity explains the nature and behavior of all phenomena on the macroscopic level (things that are visible to the naked eye); quantum theory explains the nature and behavior of all phenomena on the microscopic (atomic and subatomic) level. Perplexingly, however, the two theories are incompatible. Unconvinced that nature would prescribe totally different modes of behavior for phenomena that were simply scaled differently, Einstein sought a theory that would reconcile the two apparently irreconcilable theories that form the basis of modern physics.
Although electromagnetism and the strong and weak nuclear forces have long been explained by a single theory, known as the standard model, gravitation does not fit into the equation. The current quest for a unified field theory (sometimes called the holy grail of physicists) is largely focused on the superstring theory and, in particular, on an adaptation known as M-theory.
This theory aims at providing an explanation for all known forces and physical effects using the same language, and showing that everything is made up of the same elementary entity. Physicists hope that a Grand Unified Theory will unify the strong, weak, and electromagnetic interactions. There have been several proposed Unified Theories, but we need data to pick which, if any, of these theories describes nature. All the interactions we observe are all different aspects of the same, unified interaction. However, how can this be the case if strong and weak and electromagnetic interactions are so different in strength and effect? Strangely enough, current data and theory suggest that these varied forces merge into one force when the particles being affected are at a high enough energy.
There are many things not yet properly explained by conventional physics. Forces like magnetism, static electricity and gravity need to be inter-related to a high degree, and their activities must be better understood. Also, what I call the hard particle paradigm has made such achievement much more difficult than it really is.