There is to be one royal lie, which, Plato hopes, may deceive the rulers, but will at any rate deceive the rest of the city. This lie is set forth in considerable detail. The most important part of it is the dogma that God has created men of three kinds, the best made of gold, the second best of silver, and the common herd of brass and iron. Those made of gold are fit to be guardians; those made of silver should be soldiers; the others should do manual work. Usually, but by no means always, children will belong to the same grade as their parents; when they do not, they must be promoted or degraded accordingly. What Plato does not seem to understand is that the compulsory acceptance of such myths is incompatible with philosophy, and involves a kind of education which stunts intelligence.p. 113.