Ăngghen has shared that perception of Semitrailers-gan. Ăngghen for that: "Semitrailers-gan is the first, understanding the problem has found a way to sort the pre-history of humanity into a certain system, as long as 2 more yet to be more material makes people see the need to change back, no doubt, dividing the period of Semitrailers-gan still value" 1. When analyzing the prehistoric cultural stages as Ăngghen Implements-the liver only interested in early times and two step transition to the third era. In the first time two Semitrailers-gan divided each era into the high, middle and low stage with resident characteristics, activities, and creative workers initially. Ăngghen has the essential content of the time according to the conception of Semitrailers-gan: "primitive era-an era in which the possession of natural produce available prevails; What products do people create the primarily are tools created favorable conditions for the possession of the other
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