Wikipedia: Grand unification theory

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Grand unification refers to the theory that unifies
the [strong nuclear interaction]? and [electroweak interaction]?. There are several of those schemes, but
none is universally accepted. The (future) theory that will
include also gravitation? is termed theory of everything.

Grand unification or Grand unified theory refers to a theory in physics that unifies
the [strong nuclear interaction]? and [electroweak interaction]?. Several such theories have been proposed, but none is currently universally accepted. The (future) theory that will also include gravity is termed theory of everything.

Grand unification or Grand unified theory refers to a theory in physics that unifies the [strong nuclear interaction]? and [electroweak interaction]?. Several such theories have been proposed, but none is currently universally accepted. The (future) theory that will also include gravity is termed theory of everything.