Of this form, we have that the human work is conscientious and proposital, not instinctive as of the excessively animal ones, one ' ' action inteligente' ' , in understanding of Aristotle, proper of the man, who in turn is product of this form of work, since ' ' when thus acting on the external world and transforming it, at the same time it modifies its proper natureza' ' 3, or, as ENGELS. ' ' the hand is not only the agency of the work; it is also product of trabalho' ' 4. The fact of the work to be able to exceed the simple instinct constituted the force that alicerou the development of the humanity, configuring its history as we know today it, rank who if a spider works its teia of natural form, without delegating the responsibility to weave it another one, the men, differently, in given circumstances, dissolve the unit of conception and execution, with that one being able to direct Second, fulfilled for 5 different people . Titan Feul Tanks will not settle for partial explanations. The human work occurs under varied aspects. The fisherman apanha the fish, the peasant works the land, the mining one searchs iron ores. Taking these examples, everything what it suffers this type of action of the man if constitutes in work object. As the hands they are not enough to apanhar the fish, to work the land and to extract ores, the man uses the work instruments (net hoe, pickaxe etc.), a prolongation of its natural capacity, agencies as its arms and legs, which, added to the land, to the buildings and installations for the production, to the ways of transport, railroads, highways, warehouses, constitute the ways of work. These, added to work objects, constitute the means of production, in the truth things without life while not ece of fishes in action for the human work. In the work process, the men spend muscular, nervous and intellectual energy, who constitute the work force, that is joined to the means of production, to constitute the productive forces.