We pray daily for the Kingdom and look forward to it's coming, but do we understand what it means to live in a kingdom as a form of government?
Today there are no examples to see how they work. The biggest governmental problem in the universe has been Lucifer's rebellion against the perfect government of God. How can we know, and how can God know that we will not rebel like he did if we don't agree with the administration some time into eternity? If we can learn to submit to corrupt, unfair, oppressive authority now, we can know we will be OK with God's perfect government.
His Kingdom is coming, let's be ready.