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Marwhini,

While I remain sympathetic of your quest for a unified theory to explain Arda and Middle Earth I hope you realize that the result can only be another work of fiction, unlike say the mathematics of Pythagoras, or the physics of Newton or Einstein's special theory of relativity.

Much like you, many of us here enjoy speculation in how Middle Earth 'worked'. The first and foremost Tolkien scholar and son, Christopher, shared this interest and thanks to his work we have a lot of intriguing material apart from his father's published work. It's fascinating to look at the "white spots" of the maps and imagine what you might find there.

In our real world scholars and scientists, kings and commoners used to do they same. They knew there had to be "something" out there beyond their knowledge, they wanted to learn and understand, but in lack of solid data they used their imagination to fill the unknown. Often they populated the imaginary lands with strange legendary beasts, like unicorns, pygmees, satyrs, dragons etc of course overseen by the mighty Gods. But slowly and surely the white spots of this world have been charted and now we know much more about its nature and natural laws, enough to disprove most of the historical misconceptions.

But unlike the real world we live in Middle Earth is fictional. The white spots on the maps of Middle Earth are unknown, but unlike in the real world there is really nothing there to be found.

Except in the mind and imagination of the reader. A fun pass-time I think, and one that JRRT embraced fully, but please don't forget that your "unified theory of Arda" can never have any relevance in relation to JRRT's actual creation. It is not natural science, only a product of your own imagination and if that is to be of any interest to other readers I suggest that you approach it in a more humble and, well, reasonable manner.