The essence of the multiverse

【real world and possible world】

The real world is the universe you live in.

A possible world is a world that can be considered logically possible.

Medieval thinkers said that God chose this reality as the best of all possible worlds.

Before quantum mechanics reached the current consensus, Einstein's world view was dominated by a "deterministic universe," in which the entire history of the universe was inevitably determined from the moment the universe was born.

In other words, "God does not play dice."

However, the discovery of ``quantum fluctuations'' has led to the idea that the future is governed by ``some kind of chance''.

Did God roll the dice?

【Who rolled the dice?】

In other words, the universe you live in is the real world until this moment, but from now on, one of the possible worlds will be chosen by chance.

Doesn't it sound complicated?

I think nature is simple.

Complexity is a signal that contains "something wrong".

Think about it.

If the future of the universe you live in is in one of the possible worlds chosen by chance, that possible world will be the actual world in the future.

And if it is chosen by chance, naturally there is also the option to proceed to other possible worlds.

The reason is that the choice is not "inevitable" but "coincidental".

If so, then every possible world has the potential to become the real world.

And what separates the possible world from the real world is "your existence".

Yes, it was you who rolled the dice.

【nothing special】

The real world is the universe you live in, but from the point of view of people living in other universes, it will be the real world.

In other words, which universe is real can only be determined relatively.

Both the real world and the possible world are just equivalent universes in the same category.

Numerous deterministic universes (always 0 in total) that are spun from "0" actually exist.

Among them, from the viewpoint of the universe where you live, or more precisely, from "your viewpoint", it looks like "infinite fluctuations".

Neither you nor the universe you think "this is the real world" is anything special.