The Utopians' treatment of valuables reflects a societal shift from valuing material possessions to valuing communal well-being and practicality.
The details about how the Utopians treat valuables develop the central idea by making an analogy between children outgrowing playing with valuables and children outgrowing playing with toys. The Utopians find pearls, diamonds, and carbuncles but do not value them as highly as other societies do, instead focusing on communal wealth and welfare.
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