4. The feudal system demanded little in the way of industry except agriculture and rude home manufactures to furnish food and clothing. Arms were purchased from other lands, the best being obtained from the higher civilization of the Moslems; but, as population increased, people began to congregate in centers and towns, and cities sprung up. These called for more varied industries, and a class of people soon became numerous who had little or no dependence upon the feudal lord. To protect themselves, craftsmen engaged in the same kind of work united and formed guilds, and the various guilds, though often warring with each other, united for the common defense. The leaders of the guilds gradually became the heads of notable burgher families who became influential and wealthy. As the cities became powerful the feudal system declined, and in many regions the powerful burghers were able to maintain their independence, not only against their old lords, but also against the monarch who ruled many lordships. 5. Between the monarch and the lords there was a natural antagonism--the monarch endeavoring to gain power, and the lords endeavoring to retain their privileges. The burghers made use of these contending forces; and by sometimes siding with the one and sometimes with the other, they not only secured their own freedom, but laid the foundation for the freedom of the people which is now generally recognized, and which forms the very corner-stone of our republican institutions. 6. But the rise of the burgher class, and the evolution of human liberty through their work, was by no means an easy task. As the military spirit was dominant, the calling of an artisan was considered derogatory, and lords and soldiers looked down upon the industrious classes as inferior beings. Scott well represents this spirit in the speech of Rob Roy, the Highland chief, in his reply to the offer of Bailie Jarvie to get his sons employment in a factory: "Make my sons weavers! I would see every loom in Glasgow, beam, treadle, and shuttles, burnt in hell-fire sooner!" To break the force of the strong military power, and to secure to the industrious classes the rights of human beings, required a continuous warfare which lasted through many centuries, and which is far from being finished at the present time. But, thanks to the sturdy valor of the burghers of the middle ages, human liberty was maintained and transmitted to succeeding generations. [Illustration: _Dutch Dikes_]