What is the Kingdom of God?

“I will declare the decree:
The Lord has said to Me,
‘You are My Son,
Today I have begotten You.
Ask of Me, and I will give You
The nations for Your inheritance,
And the ends of the earth for Your possession.
You shall break them with a rod of iron;
You shall dash them to pieces like a potter’s vessel.’”
Psalm 2.7-9