The word kingdom does not refer to geographical entities, but is rather a metaphor for earthly power.

You see, he had only come back to divest himself of all his earthly power.

Join in my delights, and there shall be earthly power for you second only to mine!

It is taken to mean that there are greater forces at work than the earthly powers of men.

It was the symbol of all his earthly power.

If we hold together, no earthly power can withstand us.

Because you won't get help from any earthly power.

"No earthly power will make me breathe that unholy drug again."

But it had always been about power - earthly power.

The tiger represents the greatest earthly power, as well as protection over human life.