Your assertion has two problems. First, it is non-sequitor. Because the Church did not deal with soteriology in depth prior to any date does not mean all that was wrote prior to then was correct.

Second, it was spoke of prior to your asserted date, and that is in my signature. I'll post a couple more as well to show you how wrong your base assertion is.

Quote
"We confess the election to life and the predestination of the wicked to damnation." Council of Valence, Mansi, 15:4

"He fulfills what he wills, properly using even evil things as if the very best to the damnation of those whom he has justly predestined to punishment." Augustine, Enchridion 26 {100} (FC 3:454; PL 40.279)

"Predestination is twofold: either of the elect to rest or of the reprobate to death" Isidore of Seville, Sententiarium Libri tres 2.6 (PL 83.606)

"It belongs to God's justice that he divides, and to his power that he divides according to his will" Ambrose, Letter 20 (FC 26:108)

A good reading of Augustine might help as well.


God bless,

william