Communio Sanctorum is the most recent product of the Lutheran-Catholic dialogue in Germany and the first major Lutheran-Catholic ecumenical statement since the ground-breaking Joint Declaration on the Doctrine of Justification. It focuses on the ecclesiastical issues that the Joint Declaration identified as the remaining obstacles to Lutheran-Catholic communion. It describes the church as the communion of saints and then uses that description as a framework for addressing some of the most ecumenical issues: sacraments, ministry, the role of the church in salvation, and...