The kingdom should be a own thread, but additional it is interesting that the israel kings were anointed by usage of an anointing oil, crysam oil, the imageof the oil was clear :
The king was anointed to bring the people comfort, consolidation the comfort of God and alwyays the people should be more important than the king, the king should represent God and be his minister in comfort (theologically)
This anointement crysam oil is even used today during the confirmation rite of young girsl and boys in the church.
The Domain of God =kingdom of God is only a spiritual meaning about comfort and consolidation, as the anointing oil symbolically represents, it is completely not a matter of a real government as JW think.
The anointment with crysam oil is a spiritual comfort,
the anointed one = Messiah is a comforter and thus
the kingdom is a spiritual one,
which brings comfort to the people of all mankind,
over human engament, love among each other,
"The King will answer and say to them, 'Truly I say to you, to the extent that you did it to one of these brothers of Mine, even the least of them, you did it to Me.'