Mormonism does not claim to be a branch, a reformation, or a modification of the Christian faith. It bases its entire right to exist on a radical historical premise: that every single Christian church on earth died shortly after the original Apostles passed away, completely destroying God's authority until it was magically restored to Joseph Smith in upstate New York in 1820.
When engaging with LDS theology, the battlefield isn't over minor interpretations of scripture—it is a binary clash over whether the historical Christian Church survived or completely self-destructed.
Biblical Christianity recognizes that while church institutions can become corrupt, the actual true Body of Christ has never been wiped off the face of the earth.
Jesus explicitly guaranteed in Matthew 16:18 that "the gates of hell shall not prevail against it." To claim the Church ceased to exist is to claim that Christ's protective promise utterly failed for 1,800 years.
LDS theology dictates that divine authority (the Purgative or "Melchizedek" Priesthood) was completely taken back into heaven due to wickedness.
As a result, every baptism, communion, sermon, and bible translation executed from roughly 100 AD to 1830 AD was completely unauthorized, invalid, and dead before God.
Observe how the two systems map out the past two millennia of human history:
Christ establishes His Church, commissions the Apostles, and pours out the Holy Spirit. The New Testament text is written and closed. Both sides agree authority was present here.
The Mormon Claim: The gospel is corrupted, the priesthood is lost, and darkness reigns. In the official LDS Pearl of Great Price, Joseph Smith claims Jesus told him that "all their creeds were an abomination in his sight; that those professors were all corrupt..." (Joseph Smith—History 1:19).
⚠️ Christian Counterpoint: God left a continuous line of witnesses throughout history. Even during medieval institutional failures, the true gospel survived in underground believers and eventually burst forth in the Reformation.
Joseph Smith claims John the Baptist and the apostles Peter, James, and John appeared to him physically in Pennsylvania/New York to hand back the lost priesthoods. The Church of Jesus Christ of Latter-day Saints is officially structured as the only valid church on Earth.
Next Up: Now that the claim of authority is drawn, we have to look at what this "restored" authority taught. Page 2 moves past the organizational setup and into the core cosmic shock: the staggering differences in who God and man actually are.