Although he never went abroad, Andrew Fuller was a zealous promoter of world missions, influencing countless missionaries, such as William Carey, and championing the importance of sound doctrine for the perseverance and fruitfulness of world evangelism. In this short biography, John Piper puts Fuller’s movement-inspiring life and theology on display, calling all Christians to devote themselves to knowing, guarding, and spreading the true gospel—even to the very ends of the earth.