Catholicity and the Covenant of WorksJames Ussher (1581 1656), one of the most important religious scholars and Protestant leaders of the seventeenth century, helped shape the Church of Ireland and solidify its national identity. In Catholicity and the Covenant of Works, Harrison Perkins addresses the development of Christian doctrine in the Reformed tradition, paying particular attention to the ways in which Ussher adopted various ideas from the broad Christian tradition to shape his