Protestant Reformation: The religious revolution in 16th-century Europe that led to new branches of Christianity breaking away from Catholicism, including Calvinism.
Predestination: A doctrine in theology concerning human fate being predetermined by divine will - central tenet in Calvinist belief system.
Theocracy: A system of government in which priests rule in the name of God or a god. In some Calvinist societies, this was the preferred form of governance.