For 2500 yearsΒ βdeath reigned from Adam to MosesβΒ (Rom. 5:14).
During this period of history it was demonstrated that βdeath passed upon all men,β not because the Law of Moses had condemned them to death, but simply because they were the offspring of fallen Adam, and depraved by nature. Entirely apart from the Law,Β βsin, when it is finished, bringeth forth deathβΒ (Jas. 1:15). ThusΒ βdeath reigned from Adam to Moses, even over them that had NOT sinned after the similitude of Adamβs transgression.β
For 1500 years, under the law,Β βsinβ¦ reigned unto deathβΒ (Rom. 5:20,21).
Sin had surely risen to its height during Paulβs early years. Christ had been crucified and even after His resurrection His enemies had stood by that awful deed. Israel had joined the Gentiles in declaring war on God and His anointed Son (Psa. 2:1-3) and Saul of Tarsus was the leader of the revolt. It was no longer merely a matter of sin; it was nowΒ rebellion.
For 1900 years, βgrace [has] reigned, through righteousness,unto eternal life, by Jesus Christ our Lordβ (Rom. 5:21).
Thus we are now living underΒ the reign of grace. As βDEATH REIGNED from Adam to Mosesβ (Rom. 5:14); as SIN REIGNEDΒ βunto deathβΒ after βthe Law enteredβ (Rom. 5:20,21), so now grace abounds, THAT GRACE MIGHT REIGNΒ βthrough righteousness unto eternal life by Jesus Christ our LordβΒ (Rom. 5:20,21).
For 1000 yearsΒ the Lord Jesus Christ will reignΒ upon this earth (Rev.20:1-6), as King over Israel and the nations.
The kingdom will then be delivered over to the Father (I Cor. 15:24-28).
For all eternity the Father, Son and Holy SpiritΒ will reignΒ in the person of Christ (Rom. 11:36; Eph. 1:10). source