The charge of the universe is said to be zero. The most general argument I hear about this is that: since there was no net charge before the universe there must not be any after. Hence the universe is neutral.
But since many theorists believe in a multi-verse*, shouldn't the total charge of the multiverse be zero and individual universes might or might not have charges?
Yet people say that the universe is neutral. Since I'm not very familiar with the topic, I assume that there must be other ways to find out.
Can someone clarify why the universe is electrically neutral.
*By multiverse I am referring to the first-level Tegmark multiverse.