One of the greatest of all revolutions was the 16th-century religious revolt known as the Reformation. This stormy, often brutal, conflict separated the Christians of Western Europe into Protestants and Catholics. So far-reaching were the results of the separation that the Reformation has been called a turning point in history. It ushered in the Modern Age because, once the people’s religious unity was destroyed, they began to think in terms of their own regional interests. From the diversity of those interests arose new political, social, and economic problems and beliefs.