“All Is Calm: The Christmas Truce of 1914” is a beautifully moving epistolary oratorio about the remarkable true story of British, French, and German soldiers emerging from their trenches and ceasing conflict on Christmas Eve 1914 to celebrate together.  Gorgeously sung by an ensemble of ten men, and keenly structured and staged with gripping immediacy and emotion, this tribute to an unheralded moment in an increasingly forgotten war provides a glimpse of our common humanity at its greatest.