2 is what you have when you decide to divide the One into 2 observable parts...an arbitrary, but possible decision. If you decide to divide the One into trillions of observable parts, then you have the observable Universe. It's still One Universe.

A jellyfish is one jellyfish, but if you look at it under a microscope you will find that it is many millions of little cells cooperating efficiently together in a common purpose. They cooperate effectively because they are One in consciousness, and they naturally accept that they are One. We would be well advised to do the same, rather than fighting against one another.