Fred:
I must have past this without realizing I should have commented.
The Kingdom of God is, at least in part right here on earth and populated with the Church Militant, those of us here on earth, the Church suffering, those of us in purgatory, and the Church Triumphant, those of us in Heaven.
Paul's letter to the Ephesians shows that Christ intended to leave his Kingdom here on earth in the capable hands of Peter and the rest of the Apostles. The reason is clear, it's in these verses of Ephesians where we see the depth of what John saw in Revelations chapter 1, “from Jesus Christ, who is the faithful witness, the first begotten of the dead and the prince of the kings of the earth, who hath loved us and washed us from our sins in his own blood, And hath made us a kingdom, and priests to God and his Father. “ (Rev 1:5,6)
Now therefore you are no more strangers and foreigners: but you are fellow citizens with the saints and the domestics of God: Built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone:
These verses show the supporting elements of the Kingdom on earth, the apostles, the prophets, and Jesus Christ as the Corner stone. Even buildings today, we find the name of the owner, founder on the corner stone along with the date of completion. Some would say that Christ is the foundation on which our faith is based: and he is. But, he's the foundation in the sense of its founder, not the foundation on which the structure is bound. The Roman Church holds that Christ is the founder on which Peter the stone foundation was placed. Through God's grace, we are able to participate in the construction and occupation of the Kingdom.
In whom all the building, being framed together, groweth up into an holy temple in the Lord. In whom you also are built together into an habitation of God in the Spirit.
This foundation is built on both Gentile and Jew; as well as the Apostles, the Prophets and its' founder Christ. A union “framed together”, because “being many, are one bread, one body: all that partake of one bread." (Cf. 1 Cor 10:17). A universal Kingdom of God of one root, bound together in spirit of the cornerstones purpose.
And so we say “And hath made us a kingdom, and priests to God and his Father” inherited by default from the Jews, It was from the Sanhedrin that the power transferred given to a nation yielding the first fruit, Christ (Cf Matt 21:43). This Kingdom is fulfillment of God's promise to Moses, to build a priestly Kingdom, and a holy nation. (Ex. 19:6)
The point is, while you've been waiting for the Kingdom to come, it's been just around the corner the whole time.
JoeT