No.
You ask "Is this a law of physics?"
TheRealTL said:
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All known systems are observed as the ratio of attractive and repelling fields
To be a law of physics, in the traditional sense, a statement must predict some observable phenomena, so that it can be empirically tested.
This statement of yours does not appear to predict anything that one could observe.
In which case it has no empirical content, and therefore cannot be a law of physics.
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I suppose the right venue for your idea might be a branch of philosophy. Metaphysics?
The Philosophy of Physics?
The publishing house called North Holland has a book out called
Handbook of Philosophy of Physics. I've read one of the chapters, by George Ellis, which was pretty good. You might like this Handbook of PoP.
Maybe you could get your thread transferred to Philosophy forum, or to General Physics, where people could discuss it.
They would probably say that on a metaphysical level your idea is naive or simply wrong, because many if not most physical theories/models do not use the ratio of directional fields to explain/predict. I say "directional" because you qualify your fields idea as "attractive or repelling". Ratios are not always well-defined. May require simplifying assumptions. With enough simplifying assumptions you may be able to cram many physical models into some pre-conceived mold, but then by over-simplifying you lose the ability to make accurate predictions.