The debate over the Lord's Supper had momentous consequences for the Reformation, causing the division of the evangelical movement, influencing the formation of political alliances, and contributing to cultural differences among the Protestant territories of Germany and Switzerland. Karlstadt and the Origins of the Eucharistic Controversy is the first full-length study of the beginning of that debate. Going beyond the traditional focus on Martin Luther and Ulrich Zwingli, it emphasizes the diversity of the "sacramentarian" challenge to traditional belief in Christ's...