Question: Was the apostasy after Christ complete?

For millenia, a variety of observers and religious thinkers have argued that the Church organized by Christ did not persist to their day

Some Christians charge that although the apostasy is predicted in scripture, that this would not be a universal apostasy. They insist that a band of faithful Christian believers who kept the "true faith" were always present on the earth. The presence of these believers means, for the critic, that there was no need of a Restoration as taught by Joseph Smith. From the Evangelical perspective, Mormons "were the ones to initially separate their church from, in their view, apostate Christendom."

For millenia, a variety of observers and religious thinkers have argued that the Church organized by Christ did not persist to their day. The Latter-day Saints are not unique in this belief, nor can they be excluded from "Christianity" for teaching this doctrine.

Indeed, much of Christian history has revolved around the belief that no true expression of Christ's Church was on the earth, which resulted in efforts to establish just such a church.

The idea that no Christian church has continuity with the church established by Jesus is not unique to Mormons

The realization that no Christian church has continuity with the church established by Jesus in divine authority or doctrine is not an idea that originated with the LDS Christians. Many Protestant clergymen and others have long realized that if the Catholic Church's claims to be the proper continuation of Christ's church are false, then a universal apostasy must have occurred.

Indeed, were it not for a belief in the complete apostasy of all current churches, there would have been no motivation for the founders of various denominations to start their own churches—they would have simply joined the denomination which they believed had continuity with the original church of Jesus and the apostles. This is, of course, why churches which separated from Catholicism are called Protestant churches. Therefore, it defies reason for a non-Catholic to claim that Mormons were the "first" to separate themselves from what they considered "apostate" Christianity.

Notes

Question: Was the apostasy after Christ complete?