Though known today largely for dating the creation of the world to 400BC, James Ussher (1581-1656) was an important scholar and ecclesiastical leader in the seventeenth century. As Professor of Theology at Trinity College Dublin, and Archbishop of Armagh from 1625, he shaped the newly protestant Church of Ireland. Tracing its roots back to St. Patrick, he gave it a sense of Irish identity and provided a theology which was strongly Calvinist and fiercely...