First class began to emerge as early as dotsivilizatsionnuyu era when man began to create permanent settlements, farming, pottery and mastered blacksmithing. One and the same person because of their limited forces could simultaneously mold pots, forge metal tools and cultivating food, so I started to develop the exchange of commodities.
A new round of the professional division of men arose with the emergence of a centralized state. Rulers needed warriors to protect their possessions and control to manage them. Thus began to form military and administrative professions. Mankind has finally embarked on the professional division of labor.
