I know the enemies of Gods word and of the blessed Truth of election and reprobation have laid siege on romans nine, perhaps the most thorough divine Revelation on these blessed realties, election and reprobation by the eternal purpose of God..

Within the context of the purpose of election rom 9:

11(For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth;)

12It was said unto her, The elder shall serve the younger.

13As it is written, Jacob have I loved, but Esau have I hated.

14What shall we say then? Is there unrighteousness with God? God forbid.

What does God mean here ? That the elder brother shall serve the younger ?

God is here keeping the balance of thought and truth together, that of election and reprobation, Gods eternal Love contrasted with His eternal hatred.

Within the counsel of God, the reprobate are created in subservience to the elect.

God has been pleased to create a portion of mankind to experience His hate and severity, in order to demonstrate and magnify His Love for the election of grace.

Its in line with the ideal taught in scripture of God creating a ransom to take the place of the righteous, but for demonstration purposes..

Here is a scripture for that ideal..Isa 43:3-4

For I am the LORD thy God, the Holy One of Israel, thy Saviour: I gave Egypt for thy ransom, Ethiopia and Seba for thee.

4Since thou wast precious in my sight, thou hast been honourable, and I have loved thee: therefore will I give men for thee, and people for thy life.

prov 21:

18The wicked shall be a ransom for the righteous, and the transgressor for the upright.

Now, let me make something clear, i am not and do not believe , nor am i promoting that God paid the devil a ransom, nor do i believe or am promoting that other human beings, by their lives being taken, that it  propitiated God for their sins..No, for the Lord Jesus Christ was the ransom for the chosen remnant, and His blood was paid to the Father for the ransom of Gods dear children..

But, what I am advocating, is that God did in order to demonstrate His great redeeming Love toward His chosen, He did include in His eternal purpose, a seed within mankind [the seed of the serpent gen 3:15], that would be created and marked out for destruction and reprobation for their sins, again to demonstrate His awesome Love and Mercy for those who were blessed to be of that election of grace..

So all the non elect of mankind serve this purpose, the non elect serve the purpose of the elect in the Sovereign demonstration of Gods Mercy and His Justice..for the elect, mercy , but unto the non elect, Justice and perdition..

in the scheme of teaching this most solemn truth, God inspired Paul of the historical facts of Jacob and Esau, and how God, even within the same family, had demonstrated His Sovereign difference of election and reprobation, and so it was that the elder [ Esau [ would serve the younger [Jacob] or it could be rendered, the elder [reprobation/hated] served the younger [elected/Loved]..

Gods Love toward His chosen people is supreme in His counsel of decree. It being more fully realized when He brings into existence people who will finally be Darned for their sins, hence reprobation is necessary [ Only as God Willed it so] to be a contrast of election..

All the non elect hated in the world, are the same as Esau, brought into existence to serve the purpose of all the Loved Jacobs in the world, so, for this cause, the elder shall serve the younger