Dear Emmanuel,
We may classify the physical revolutions in at least two types. (A) Those that encompass and comprehend simpler theories and (B) those that replace one established theory for another theory with a radical philosophy. Perhaps, the revolution that you have in mind corresponds to type A, for example, the revolution of relativity (R) which encompasses Newtonian mechanics (NM). Or String theory (ST) which encompasses R and quantum mechanics (QM), etc. As you said these new theories must, at a certain limit, be compatible or reducible to the simpler theories. By contrast, the replacement of the geocentric theory by the heliocentric theory is of type B. The geocentric theory was a very accurate model and it was not abandoned because it did not work but because it was easier to consider the sun at the center of the universe, and in this way the calculations and the concepts were extremely simplified. I hope we agree in these points.
Thus recall that after trying all (supersymmetry, string theory, loop quantum gravity, technicolor, etc.) and not achieving anything concrete the best thing to do is to start over. So, the revolution that I have in mind is of type B, that is, to replace relativity for another theory that explains the same physical phenomena but with a radical different philosophy (a material continuum and thus a privileged frame). This approach is conceptually easier and mathematically simpler (in comparison to, say, string theory), and it can be used to explain the indeterminacy of quantum mechanics, the unification of waves and particles as one single entity (solitons) and the unification of the other theories, i.e., QM, electrodynamics, classical mechanics. Also this theory eliminates the probabilistic interpretation of QM. If you are interested take a look: C. Christov, Math. Comput. Simul., 80, 91 (2009).
But we need a new assumption to explain the beginning of the universe and the unity of Physics. I postulate that photons are the primordial elements in order to remove the initial singularity. This idea comes from the work of Stephen Hawking that remove a mathematical gravitational singularity with emission of a black body radiation. This is one of the first work that bring together the relativity and Quantum mechanics.
This paragraph is based on the assumption that the cosmological model is correct. But this model is basically based on relativity, and if the philosophy of Relativity is flawed, the conclusions may be too.
For physical reasons, I think that the primordial radiation is a radiation of photons. With photons only, the notion of time falls down. We cannot really say "light before matter" (matter being all massive or charged particles) because time does not exist with photons only. I think that time starts with the first pair production. I just say that energy was here and carried by photons/light outside of time and outside an initial singularity where all values become infinite.
If the only thing that existed were really photons, It is not clear to me why there is no time. Could you explain this to me.
Israel