The deep-reaching importance and effective spread of such movements was infinitely greater in the Middle Ages than in modern times. The same phenomenon presents itself to-day in backward and semi-barbaric communities. At first sight one is inclined to think that there has been no period in the world's history when it was so easy to stir up a population as the present, with our newspapers, our telegraphs, our aeroplane, our postal arrangements, and our railways. But this is just one of those superficial notions that are not confirmed by history. We are similarly apt to think that there was no age in which travel was so widespread and formed so great a part of the education of mankind as at present. There could be no greater mistake. The true age of travelling was the close of the Middle Ages, or what is known as the Renaissance period. The man of learning, then just differentiated from the ecclesiastic, spent the greater part of his life in earning his intellectual wares from Court to Court and from University to University, just as the merchant personally carried his goods from city to city in an age in which commercial correspondence, bill-brokers, and the varied forms of modern business were but in embryo. It was then that travel really meant education, the acquirement of thorough and intimate knowledge of diverse manners and customs. Travel was then not a pastime, but a serious element in life. In the same way the spread of a political or social movement was at least as rapid then as now, and far more penetrating. The methods were, of course, vastly different from the present; but the human material to be dealt with was far easier to mould, and kept its shape much more readily when moulded, than is the case nowadays. The appearance of a religious or political teacher in a village or small town of the Middle Ages was an event which keenly excited the interest of the inhabitants. It struck across the path of their daily life, leaving behind it a track hardly conceivable to-day. For one of the salient symptoms of the change which has taken place since that time is the disappearance of local centres of activity and the transference of the intensity of life to a few large towns. In the Middle Ages every town, small no less than large, was a more or less self-sufficing organism, intellectually and industrially, and was not essentially dependent on the outside world for its social sustenance. This was especially the case in Central Europe, where communication was much more imperfect and dangerous than in Italy, France, or England. In a society without newspapers, without easy communication with the rest of the world, where the vast majority could neither read nor write, where books were rare and costly, and accessible only to the privileged few, a new idea bursting upon one of these communities was eagerly welcomed, discussed in the council chamber of the town, in the hall of the castle, in the refectory of the monastery, at the