That theory, a concept first proposed by Albert Einstein and often reiterated by British astrophysicist Stephen Hawking, seeks to find a single set of equations that can explain all the fundamental forces in the universe: gravity, electromagnetism, and the strong and weak interactive forces among subnuclear particles.
electromagnetism is not a fundamental universal force.
( z1 force :polarity - :ARG0 ( z2 electromagnetism ) :mod ( z3 universal ) :mod ( z4 fundamental ) )