Hi Edwin,
I kept wondering why I have not been seeing any posts regarding interesting essays, under the "Recent Forum Posts". It just dawned on me that only posts about blogs, not essays, appear there now. Bummer!
I recently encountered this essay, from a local college, that I think you might find interesting, in the context of your essay:
Fields and Particles and Being
The essay, by Dylan Casey, begins on p. 57 of the PDF file.
The essay is published in "The St. John's Review". St. John's is a rather unique, small liberal arts college, whose entire curriculum is devoted to reading and discussing "Great Books". Consequently, the faculty members, called tutors, are well versed in the history of philosophical and scientific thought. Dylan Casey is a physicist, turned tutor. His essay concerns how notions about the nature of "particles" and "fields" evolved over the centuries and into modern Field Theory. Because of his position, at the college, he is rather more cognizant of the distinction between actual physics and metaphysical speculation, than most modern physicists.
The essay begins by noting the problem of "Action at a Distance", encountered in Particle Interactions. It then notes that Faraday "coined the term field", to avoid this problem; particles don't interact, at a distance, with other particles, they only interact with the field they are immersed in. Subsequently, Maxwell and Einstein delved into the origins of such fields and hit upon the notion that particles might disturb the field near them, and these disturbances propagate, at finite speed, towards other particles, and thereby alter the field near them, thereby altering their response to their local field.
This brings me to your intriguing "master equation". As you know, I'm not particularly fond of pulling mathematical rabbits out of physical hats. But I like the idea of starting solely with a single, self-interacting field. But why assume that the *entire* field is interacting with itself? Perhaps, given any finite speed for the propagation of disturbances, and a large physical universe, only localized interactions are possible, like schools of fish, and flocks of birds. The evolution of the interaction occurs as a result of the constantly changing subset of the field, that is actually influencing any given particle, at any given moment.
I could say more regarding my take on gravity as geometry, consciousness, the Holographic Principle and the like, but, at least for now, I'd mainly like to hear your thoughts regarding global vs. local self-interaction.
Let me give you a little more idea of where I am coming from. You are familiar with some of my concerns regarding the usage of Fourier Transforms in Field Theory. Let me be explicit about it, in the present context. Spatial Fourier Transforms integrate over all space. Temporal ones integrate over all time. But, they cannot integrate over a disturbance that has not yet arrived, unless one reintroduces instantaneous action, not just at a spatial distance, but temporal, future ones, as well. Hence they cannot be a correct model for any local interaction. This is why communications engineers introduced concepts like "instantaneous frequency" as opposed to "Fourier Frequency", to extract information from only localized fields.; localized in both space and time.
Rob McEachern