Charge neutrality is that charge comes in equal positive and negative amounts. The earth is charge neutral, as is our galaxy, and the universe seems the same, but why? If matter arose as Venus did from the sea, complete and perfect, why are the two options of its charge accessory equal? It isn’t at all obvious why our universe has many electrons as protons, and twice as many down as up quarks, but it seems to be so. If matter just began, charge neutrality has no explanation.
Quantum events repeat at a fantastic rate, so any entity that isn’t fully stable will re-configure sooner or later. Our world tries every option until one sticks, i.e. is stable. After the initial chaos, electrons, neutrinos, and quarks survived by being stable, and the first atom formed because protons and electrons survive better together than apart. The electrons around a nucleus shield it from neutrino strikes that could turn a neutron into a proton, and the nucleus holds the electrons in orbit, so they don’t fly off. Other atoms then evolved with equal numbers of protons and electrons because that is stable.
It follows that our universe is charge neutral because matter is made of charge-neutral atoms, so it is charge neutral by evolution not by design. The evolution of matter explains charge neutrality better than assuming that matter just is as it is.
Atoms evolved by the law of all action, that whatever can happen eventually does, as quantum choices try every option, so our universe is evolving to discover what survives. Yet the standard model prefers determinism to quantum randomness, and has focused on transient particles, like the Higgs, that have no permanence. Physics needs a better model than one that denies both quantum theory and evolution.