The result, then,
is that more plentiful and better-quality goods are more easily
produced if each person does one thing for which he is naturally
suited, does it at the right time, and is released from having to
do any of the others.
In Book II, Socrates introduces the
principle of specialization. According to Plato, political justice
boils down to this guiding rule—that everyone do that to which their
nature best suits them, and not meddle in any other business. Producers
must produce according to their natures (e.g., the farmer farms,
the carpenter builds wooden objects, the artist paints, and the
doctor heals); warriors must fight; and the philosophers must rule.