[Side-note: Fundamental creed required to be planted in the minds of all the citizens respecting their breed and relationship.] Here then our city will take its start; the body of Guardians marching in arms under the orders of their Chiefs, and encamping in a convenient acropolis, from whence they may best be able to keep order in the interior and to repel foreign attack.[81] But it is indispensable that both they and the remaining citizens should be made to believe a certain tale,--which yet is altogether fictitious and of our own invention. They must be told that they are all earthborn, sprung from the very soil which they inhabit: all therefore brethren, from the same mother Earth: the auxiliaries or soldiers, born with their arms and equipments. But there was this difference (we shall tell them) between the different brethren. Those fit for Chiefs or Rulers, were born with a certain mixture of gold in their constitution: those fit for soldiers or Guardians simply, with a like mixture of silver: the remainder, with brass or iron. In most individual cases, each of these classes will beget an offspring like themselves. But exceptions will sometimes happen, in which the golden man will have a child of silver, or brass,--or the brazen or iron man, a child of nobler metal than his own. Now it is of the last importance that the Rulers should keep watch to preserve the purity of these breeds. If any one of their own children should turn out to be of brass or iron, they must place him out among the husbandmen or artisans: if any of the brazen or iron men should chance to produce a child of gold, they must receive him among themselves, since he belongs to them by his natural constitution. Upon the maintenance of these distinct breeds, each in its appropriate function, depends the entire fate of the city: for an oracle has declared that it will perish, if ever iron or brazen men shall become its Guardians.[82] [Footnote 81: Plato, Republic, iii. p. 415 D.] [Footnote 82: Plato, Republic, iii. pp. 414-415.] [Side-note: How is such a fiction to be accredited in the first instance? Difficulty extreme, of first beginning; but if once accredited, it will easily transmit itself by tradition.]