[Footnote 56: Plato is one of the very few Greek authors none of whose
work has been lost. He shares this good fortune with Xenophon. Of the
dialog Plato was practically, if not actually, the originator, and the
form has survived to our day.]
[Footnote 57: From "The Republic." Translated by Benjamin Jowett. In
this famous work Plato describes an ideal commonwealth.]
[Footnote 58: The speaker here is Glaucon, Plato's brother.]