My problem with Postmillenialism.

 Daniel2:35KJV"Then was the iron, the clay, the brass, the silver, and the gold, broken to pieces together, and became like the chaff of the summer threshingfloors; and the wind carried them away, that no place was found for them: and the stone that smote the image became a great mountain, and filled the whole earth."

Daniel2:44KJV"And in the days of these kings shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, but it shall break in pieces and consume all these kingdoms, and it shall stand for ever."

Revelation20:11KJV"And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them."

Note please that the Rule of JEHOVAH'S kingdom over this earth takes place after the destruction of the present human kingdoms there is to be no millennium of parallel rule between JEHOVAH'S kingdom and Satan's empire.

Revelation20:6KJV"Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years."

1Corinthians15:23KJV"But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming(Parousia)."

John6:39KJV"And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day."

Note that the millenium Follows the first resurrection which follows the beginning of Christ parousia Paul makes it clear that the present age is not the time for Christians to seek any dominion over the earth or any part thereof."Now ye are full, now ye are rich, ye have reigned as kings without us: and I would to God ye did reign, that we also might reign with you."

Hebrews2:8KJV"Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing that is not put under him. But now we see NOT YET all things put under him." 

Evidently Paul did not think that Christ millenial reign had begun.