All mankind must perish

1. Mosiah 15: 19
     19 For were it not for the redemption which he hath made for his people, which was prepared from the ^afoundation of the world, I say unto you, were it not for this, all mankind must have ^bperished.
2. Alma 34: 9
     9 For it is expedient that an ^aatonement should be made; for according to the great ^bplan of the Eternal God there must be an atonement made, or else all mankind must unavoidably perish; yea, all are hardened; yea, all are ^cfallen and are lost, and must perish except it be through the atonement which it is expedient should be made.