Part Four: Structure, Liturgy, and What Is Required
Section 33: Missionary Service — The Two-Year Commitment
The LDS missionary program deploys approximately 70,000 full-time missionaries globally at any given time. Young men are called at 18; young women at 19. Missionaries are assigned by church headquarters to a specific mission field worldwide, with no input from the missionary or their family. The two-year commitment involves complete immersion in the institutional identity of the church: daily study of LDS materials, uniform dress, regulated social contact, and structured proselytizing.
The missionary experience is one of the most effective identity-formation tools the LDS institution deploys. A young person who has given two years of their life — including sleep, diet, social relationships, and daily schedule — to an institution has made an investment that is deeply difficult to walk away from. The mission forms the institutional identity of an entire generation of LDS men at precisely the point in their development when identity is being consolidated. The church that sends them at 18 receives them back at 20 as adults whose deepest formative experience is inseparable from the institution.
The disciple engaging a returned missionary is engaging a person for whom the LDS system is not an idea they hold at arm's length. It is the experience through which their adult identity was formed. The conversation requires the patience the Spirit supplies — not the efficiency of a debate.

