Answer:
- Plato, Republic
Step-by-step explanation:
The source of the given quote is 'The Republic' by Plato. Plato in 'The Republic' is divided into ten books that describers the ideals of a just city-state, justice order, and man. The given quote is an excerpt from Plato's book (iii) (section III) of 'The Republic' portraying the ideal city with his authoritarian aspects. He describes the ideal city where 'all of you in the city are brothers' and divided the citizens into two groups: rulers and the auxiliaries followed by the third group of craftsmen. In his description, rulers are the gold implying that they should be most experienced and elder while auxiliaries would protect and defend the state(silver) and farmers( iron and bronze) would use their skills to nurture the state. Thus, the source of the given quote is Plato's "The Republic" in which he proposes a 'class society'.