Revelation 5:2,3

2 And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof?

3 And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon.

The angel was looking for someone who was worthy to open the book and read it but no natural seed of man could be found in the universe to open the book. This is because all have sinned and no man is worthy (Romans 3:23).  Even the strong angel would not open the book because it had to be a kinsman redeemer descended from Adam.

After Adam sinned, he was no longer worthy to manage the earth. The earth was placed under the administration of the prince of the angels (Satan). He will be in authority over the earth until a kinsman redeemer is found who fulfills the requirement to redeem it. Much of the Bible describes the effort that Satan made to stop a kinsman redeemer from descending from Adam and from leading a sinless life.

When Satan, the ruler of this world, allowed a sinless man to die and go to Hades, he violated God's law and was an accessory to the crime. He was exposed as the murderer he is. God raised this innocent man from the dead into a new creation and condemned the ruling authorities of this world. The risen Jesus has paid the purchase price to be the kinsman redeemer and all power and authority over the earth has been restored to this second Adam. Had the rulers of this world known about this plan of God to redeem the earth they would not have crucified the Lord of Glory (1 Corinthians 2:8).

The delay from His conquering death until the unrolling of the scroll was so that many would be saved by being born into this new spiritual creation called the Body of Christ. This is the body He created and gave for all those who trust Him to cover their sins with His blood sacrifice.

The book of Ruth is a profound live play that is valuable in telling us about these truths. Ruth's role is a foreshadow of the New Covenant Church, Naomi is in the role of Israel and Boaz is the kinsman redeemer Christ figure. In the play, Boaz (Jesus)  marries the Gentile Ruth  (the Church) and restores  Naomi to the land  (Israel). Naomi's  destiny is to nurse  the child of Boaz and Ruth  (Israel's destiny is to properly raise those born in the millennium Kingdom of God on earth)  born after the great harvest  (after the end time reaping).

It might be worthwhile to notice that Ruth is at the feet of Boaz during the time of the harvest threshing (a pretribulation rapture insight).