In the Book of Mormon, there is a book by Enos called "The Book of Enos". It is a short book, only one chapter and in it, Enos tells the story of how he prayed mightily for a day and night. Because of his faith, his sins were forgiven. In fact, the lord himself tells Enos he will grant him one wish.
And it came to pass that after I had prayed and labored with all diligence, the Lord said unto me: I will grant unto thee according to thy desires, because of thy faith.
Enos is asked what he desires, and he responds:
And now behold, this was the desire which I desired of him—that if it should so be, that my people, the Nephites, should fall into transgression, and by any means be destroyed, and the Lamanites should not be destroyed, that the Lord God would preserve a record of my people, the Nephites; even if it so be by the power of his holy arm, that it might be brought forth at some future day unto the Lamanites, that, perhaps, they might be brought unto salvation—
This is what I find a little odd. Why isn't the desire of Enos that the people of the Nephites would not fall into transgression? Or why wasn't his desire that the Lamanites might be brought unto salvation today and they can live in peace and harmony with the Nephites? I understand that God can not take away the free agency of others, but that wasn't the question. The question was what was it that Enos desired, and his desire is 'just in case' the Nephites fall into transgression, and the Nephites happen to be wiped out by the Lamanites or by any other means, then preserve the record for the Lamanites in a future time. That is what he desires most? It sounds to me more like a postdiction, or just literary foreshadowing at best. I find it rather suspect that Enos' ultimate desire is a "what if" scenario.
The covenant that Enos makes with the lord is based on an "if, then" agreement. IF the Nephites fall into transgression, THEN the lord will preserve the record. So by strict letter of the covenant, if the Nephites ultimately did not fall into transgression, or were not destroyed by the Lamanites, then the lord would not have any contractual obligation to assist the preservation the record. The Nephites would be on their own. The covenant only works with the assumption that the Nephites will be wiped out at a later date. Maybe Enos didn't have much faith in his fellow Nephites and knew that inevitably they would be wiped out? But that doesn't explain why his ultimate desire wouldn't be for the lord to protect his people, but instead 'if' they happen to be destroyed, 'then' preserve the record for the descendants of the people that destroyed his people.
That would be like the lord asking me what I desire the most for my 2 year old, and my response is "what I desire most for my 2 year old is if she ever gets kidnapped, preserve her Sesame Street DVDs so that the future generations of her kidnappers can one day learn the importance of education".