"I am the church, you are the church, we are the church together.” Every child who has ever spent a sultry summer morning at vacation Bible school has learned that song. It reflects the wisdom that the church is more than buildings or preachers or prayers or doctrines. The church is the people of God. It is this tidbit of insight that led the editors at Augsburg Fortress to assemble a series called A People’s History of Christianity. Seven volumes long and organized chronologically, the series encompasses a much wider geographical range than many other introductions to Christian history. It also reflects a current debate among historians about the nature and subjects of church history.