But tides move slowly and by gradual inches. It needed two centuries more before the conditions in which the modern State could flourish had been fully and finally established. Economic conditions had to change--a process always gradual and slow; and a national economy based on money had to replace the old local economy based on kind. Languages had to be formed, and local dialects had to be transformed into national and literary forms, before national States could find the means of utterance. The revival of learning had to challenge the old clerical structure of knowledge, and to set free the progress of secular science, before the minds of men could be readily receptive of new forms of social structure and new modes of human activity. But by 1500 the work of preparation had been largely accomplished. The progress of discovery had enlarged the world immeasurably. The addition of America to the map had spiritual effects which it is difficult to estimate in any proper terms. If the old world of the Mediterranean regions could be thought into a unity, it was more difficult to reduce to the One the new world which swam into men's ken. Still more burdened with fate for the future generations was the vast volume of commerce, necessarily conducted on a national basis, which the age of discoveries went to swell. Meanwhile, men had begun to think and to write in national languages. Already by the reign of Richard II the dialect of the East Midlands, which was spoken in the capital and the universities, had become a literary language in which Chaucer and Wyclif had spoken to all the nation. Still earlier had come the development of Italian, and a little more than a century after the days of Wyclif, Luther was to give to Germany a common speech and a common Bible. It was little wonder that in such times the old unity of the Christian commonwealth of the Middle Ages shivered into fragments, or that, side by side with a national language, there developed--at any rate in England and in Germany--a national Church. The unity of a common Roman Church and a common Romance culture was gone. _Cuius regio eius religio_. To each region its religion; and to each nation, we may add, its national culture. The Renaissance may have begun as a cosmopolitan movement, and have found in Erasmus a cosmopolitan representative. It ended in national literatures; and a hundred years after Erasmus, Shakespeare was writing in England, Ariosto in Italy, and Lope de Vega in Spain.