Proto-Element, Matter, Inertia

The possibility that Electricity, as determining the fundamental structure of all elements, is the Proto-Element of the Pre-Socrates, is undermined by two discoveries of recent Physics--of smaller particles that the Proton and Electron, and of forces other than Electromagnetism.  So, a better candidate for Proto-Element might be  the Quark, in which all the fundamental forces can be found.  Still, the existence of other particles that are independent of the Quark challenges that possible reduction, as well.  But a greater challenge to the quest for such an entity is the continuing counter-evidence to the thesis that there even exists one that is not further divisible.  Regardless, what does seem a lot clearer from contemporary Physics is that contrary to long-held beliefs, Matter is not inherently inert.