The beavers must maintain a more or less fixed level of water in the stream. To do this they build a dam, starting it in the center of the stream, with a bunch of logs laid lengthwise in the stream and anchored to the bottom by means of stones and plastered clay. Gradually they build up their dam across the stream, plastered with mud on the upstream side and with a curve upstream. The curve toward the current is an astounding deduction. It gives strength to the dam. In course of time they exhaust the trees immediately adjacent to the stream, which furnish the bark they eat, so in the Ice Age they became hydraulic engineers, running canals back from the pond formed by their dam. These canals were run as truly as if done by a surveyor’s level, so that they always remained full of water. Thus the beavers could tap a fresh supply of bark by felling trees, and the canals furnished their means of transport. They carefully kept the canals free from weeds.
Most ingenious of all their acts is their felling of trees so as to make them fall at the precise place they should fall alongside the stream or canal. They stored their food supply at the bottom of the stream by sticking it into the mud or loading it down with rocks. How many unsuccessful experiments went to the development of these various instinctive habits, no one can say, but thus the beavers prepared themselves to defy the arctic winters. Like the ants, every beaver works like a beaver and their communities have “no guide, overseer or ruler”; and thus they have continued through the ages, although in a warm climate they have abandoned most of the labor imposed on them by a long winter. This instinct to avoid work seems to be ingrained even in the subconscious mind of men.
Man, who had a much better brain than the beaver, was certainly capable of just as much. Perhaps he was not entirely unprepared. The approach of the Ice Age was gradual, lasting over many thousands of years. The first advent of chilly weather must have taught men the necessity of preserving fire. There was no necessity for inventing fire. It was there to use. Certainly they had felt no need of its uses in a tropical climate. Then and there, at the advent of the cold, began man’s worship of fire and the cult of the sacred flame which must never be allowed to expire. True to his nature, man continued to worship the sacred flame, long after he had lost all necessity for maintaining a fire. At this time of the long approach of cold some one of humankind had found that a cutting edge, an actual weapon, could be fashioned by chipping flint. Slowly the flint knife, the flint-headed spear or javelin, and the flint axe came into use. These inventions made invincible weapons; they passed from tribe to tribe until all men were living in what is called the Old Stone Age, consisting of the Eolithic and Paleolithic ages. Still later, when men lived in swamps or beside lakes, came the bone harpoon for spearing fish or other animals. The bow and arrow was an invention of a much later time, for that invention required a complicated sort of ingenuity.
Man had now gained the beginning of his mastery over the wild beast and had begun to alter the course of nature. Just what is the connection between the Ice Age and the development of flint weapons archaeology has not certainly told us, but we know that the two phenomena are parallel. How far men had been carnivorous animals from the beginning we cannot say, but the human dentition, which is a compromise between that of a herbivore and that of a carnivore, had not changed since man’s advent. Nor can we say whether human beings were originally fighting animals; but the proof points to their peaceful character. From the beginning they were both flesh-eating and plant-eating animals. But as soon as they became hunters of the wild beast, they would rapidly develop a fighting propensity. The general effect would be to strengthen the race with a better food supply, to give men courage and skill, and also would enable them to endure a harsher climate by reason of the covering of the body with the skins of their game. The naked brutes had begun to wear some kind of clothing.
Another change was not at first of so much importance, but it was to become so. Men naturally crept under available shelter and became cave dwellers. They were incapable of creating an artificial kind of dwelling. The use of fire enabled them to fight off the cold while sheltered in the cave, but it took men ages to learn the lesson that ants had acquired, of keeping their dwellings clean. The dwelling in caves threw men closer together. There was more communion among them and a common place to resort as a fixed abode. The development of an esthetic instinct will be noticed later. In this hunting stage language was developed, and was steadily improved. The development of spoken speech continued for countless years before a written speech was devised.
The Glacial Age gave mankind a thorough training before it relaxed its stern discipline. The ice sheets of tremendous thickness continued to advance and recede. A tropical climate would return to Europe and then the ice would again advance. Four times at least this change took place. And always came the cold and cruel winters, the failure of the food supply, the coming of famine, the dying women and children. A vivid picture of such a life is drawn in Longfellow’s Hiawatha. Farther and farther to the south the mass of men were driven. During these changes new races appeared. Many causes may have contributed to this result in the long ages. Mixing of tribes or absorption of one tribe in another, cold and want, failure of food, inability to endure the severe climate, must all have been contributing causes. Fierce fighting must have gone on among these various tribes as they were constantly driven upon each other, for the acquisitive instinct, as we shall see, came into play. If the tropical fauna and flora perished in Europe, it is likely that countless human beings perished in the same way. The important thing for history of the law is that the constant struggle for life developed a much higher mentality in man. The improvement in weapons went on until gradually the human race, having passed into the nomad and then into the agricultural stage, was, long after the Ice Age ceased, in the New Stone Age with finely polished weapons of stone. Men probably lived in the Old Stone Age more than ten times the period from the beginning of the New Stone Age until the present. The advent of the Neolithic is placed at about 10,000 B.C.
As soon as the Glacial Ages began, the necessity for some sort of food supply developed, and a result was the hunting stage. Thus began tribal property. A tribe would locate itself with reference to a hunting ground, and then and there would be born the desire to keep that ground—an incipient patriotism. Any encroachment by another tribe would be repelled by force, and thus every tribe would be hostile to every other tribe. The instinct to hold the tribal property would arise simply from the desire to keep the food supply and the developed acquisitive instinct. Pedantic philosophers have sought the origin of ideas of tribal property in tangled metaphysics and in varied speculations, all involving elaborate reasoning in the then human beings. The primeval brute did not reason. When another tribe was encroaching on his food supply, he simply resisted. This is the simple explanation. Any animal will fight for its bone. In the same way men sought to keep their cave dwellings. Thus it happened that the cave and the hunting ground were open to every one of the tribe but to no one else. The game killed by any one of the tribe went to support the tribe, but if it were killed by some one of another tribe, it was taken away from the tribe, so to speak, in possession. Thus grew up the bitter hostility between tribes, and the instinct that it was right to take anything one could from another tribe or any member of it. No possible quarrel over property could arise between members of the same tribe. Savages will despoil another tribe or its members. They will not steal from their own tribe.
Thus, it is necessary to note, in this long development into the hunting stage, fixed elementary ideas of tribal property would develop. While the hunter retained, of course, his weapons as his own, the game he killed and the hunting fields would naturally be regarded as the possession of the tribe. This institution of tribal property was to be retained by savage men for untold ages before the usage or law of property went further. After another long period the institution of tribal property was to develop into family property, from which the passage to individual property would take place almost imperceptibly. But it all goes back to the instinct branded upon men to obtain and keep a food supply. The necessity for storing a supply of food would develop