starting w/ electromagnetism, eh?
gravity seems most fundamental but there are too may things we don't know about it, ie, we know how masses attract each other:
(FG= (G m1 m2)/(d^2))
but what do we know about the WHY of gravity? why does gravity exist. mass is not an answer that is far reaching enough.
as far as the WHY of charges attracting an repelling and in that, creating a field, we are equally as clueless. we know
(FC= (k q1 q2)/(d^2)
but why?
i guess my point is, mtheory is our best bet because it is partially explained and explainable while those types of theories would be based on topics in physics in which the fundamentals remain undisclosed
curiously: