First of all, we have to learn the concept of what a kingdom is. A kingdom is a dominion ruled by a king. A king has to own land in order to have a kingdom. Because he is the owner, he has the right to give and take from his citizens. He has the right to make the laws and to punish those who do not keep the laws; he does not answer to anyone else. He owns everything in his kingdom; his citizens take care of his lands, possessions, and all that he owns.
In Psalm 47:7-9 we are reminded that the earth belongs to God who is the King of all the earth; sing to Him a psalm of praise. God reigns over the nations; God is seated on His holy throne. The nobles of the nations assemble as the people of the God of Abraham, for the kings of the earth belong to God; He is greatly exalted.
So the first king was God. He set up a perfect kingdom in the garden of Eden as a colony of His kingdom in heaven. There was no want in the garden, there was no sickness, and there was no strife. It was as perfect as heaven itself.
Everyone on earth is searching for that perfect kingdom whether we know it or not. Each of us has the desire to rule over our lives, our situations, and whatever else afflicts us. It is in us to rule; not to rule over others but to rule our own territory. When Adam and Eve gave away the kingdom, all sorts of government came into being. However, none of them is adequate because God established the only form of government that works. Even that is corrupted by kings who are evil.