A PIN with the number of employees was 10 people do the manipulations of their own expertise (the first to specialize in steel wire, the second person to make straight, a third cut into small segments, ..) will production be 50000 studs every day. If a self produced studs, then one day he can only produce a few ships is maximum (Adam Smith, The Wealth of Nations). This example works great to tell the difference between the collective and the individual, between the mass and specialization.
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