What is the nature of the background that particles sit in ? Everyone says its space-time, but then its non local and all kinds of strange things seem to happen. Even if we say they are fields and not particles (or even both), why is it that people think that particles sit in spacetime when they show characteristics that are clearly different from what normally happens in spacetime ? Why do the theortical physicists look for a way to make particles appear in a background independant way such that particles will create the background, when we have no reason to believe that particles are not just a misunderstanding of energy resonating in a layer of reality we call spacetime ? Is the background really spacetime ? If so, what evidence is there for that?