Of the new forms of industry which thus arose, the cultivation of the soil by means of the plough led to a further important change. This change was just as much an effect of the new conditions of life as it was an expression of the altered spirit of the times. The guidance of the plough is a task which prevents the field work from being any longer done in common, as it was at the height of hoe-culture and during the time of the origin of the great vegetation festivals of totemism. The individual must guide his own plough. The appearance of plough-culture _individualizes labour_. Just as the individual comes to the fore in political development and is extolled in legend as the founder of cities and States, so also is it the individual who cultivates the land. This individualistic tendency also gradually makes itself felt in the raising of domestic animals. Plough-culture gives rise to _private property_ as regards both the soil and its products.
Here again, however, the new social order influences economic life, and both together produce further changes in external culture. Individual activity receives emphasis not alone in the cultivation of the soil but also in _warfare_. Primitive man was not at all familiar with war. He slew his enemy from an ambush, attacking him but seldom in open combat. In the totemic age, when actual weapons of war first made their appearance, tribal war was a strife of many against many. As yet the individual combatants were not sharply differentiated from one another. The masses clashed with each other in unregulated strife, without definite leadership or fixed system. Only with the dawn of the political era do we find regulated single combat. Such combat then becomes the decisive factor in warfare. Consider the Homeric description of the battles before the walls of Troy. The battle is decided by champions (_promachoi_). These alight from their chariots of war and fight, man against man. The masses stand in the background, hurling lances or stones. Their actions, however, have little importance. They flee as soon as their champion falls. The result of the battle thus depends upon individuals and not upon the masses. The weapons also conform to these altered conditions. In earlier times, practically none but long-distance weapons were used--the sling, the hurled spear, or the bow and arrow, weapons similar to those employed in the chase. Single combat necessitated weapons of close range--the axe, held fast in the hand, the lance, used as a thrusting weapon, and the sword. Instead of the long shield, covering almost the entire body--shields such as even the Australians and also the earliest Greeks carried--a small round shield was demanded by reason of the use of swords in fighting. Of the various weapons found at the zenith of the heroic age, therefore, the sword is the most characteristic. It is also the most typical creation of this period. It obviously originated through a gradual shortening of the lance, thus becoming a weapon specifically adapted for individual combat at close range. Thus, the tendency toward the assertion of individual personality made itself felt in warfare and in weapons, just as it did in the State, in agriculture, and in the cult of personal gods.