Global migration is at its zenith, yet 42% of the world’s population does not know Jesus Christ. With over 7,400 unreached people groups, the Great Commission is in dire need of fulfillment. However, with 3,100 unengaged, unreached people groups, a strategic plan doesn’t even exist. While the call for foreign missions is foundational to the mission of God, the people of the world are at America’s doorstep. Multiplying Missionary Preparedness explores and examines the missionary approaches to reaching the unreached of the world via communal immigration and diaspora, short and long-term missions, and leveraging business. This resource was developed for potential missionaries, churches, training organizations, and seminaries that focus upon the biblical principles of mission, obedient Great Commission disciple-making, multiplicative reproducibility, church planting movements, and cross-cultural contextualization.