As an example, let me tell you of something that happened in the ninth century. In the town of Salerno near Naples there were a number of excellent physicians. They attracted people desirous of learning the medical profession and for almost a thousand years (until 1817) there was a university of Salerno which taught the wisdom of Hippocrates, the great Greek doctor who had practiced his art in ancient Hellas in the fifth century before the birth of Christ.