Thrasymachus assumes here that justice is the unnatural restraint on our natural desire to have more justice is a convention imposed on us, and it does not benefit us to adhere to it the rational thing to do is ignore justice entirely. Thrasymachus opens his whole argument by pretending to be indignant at socrates' rhetorical questions he has asked of polemarchus (socrates' series of analogies) socrates, no innocent to rhetoric and the ploys of sophists, pretends to be frightened after thrasymachus attacks by pretending to be indignant. Free online library: plato - the republic by plato x - socrates - glaucon - thrasymachus - best known authors and titles are available on the free online library.
Thrasymachus discounts traditional moral values on the basis of what he sees as reality socrates does not dispute thrasymachus' version of the way things are, and even demonstrates that cephalus' conventional definition of virtue is insufficient.
Summary polemarchus seems to accept socrates' argument, but at this point, thrasymachus jumps into the conversation he objects to the manner in which the argum.
Socrates - thrasymachus never mind, i replied, if he now says that they are, let us accept his statement tell me, thrasymachus, i said, did you mean by justice what the stronger thought to be his interest, whether really so or not. Socrates does not promote injustice like thrasymachus as he believes a city will not function without necessary wisdom, and virtue which can only be found when justice occurs justice is essentially virtue and wisdom according to socrates (plato, grube, and reeve pg24.
In the republic socrates reports that thrasymachus burst into the conversation like a lion socrates even claims that he and his interlocutor (polemarchus) were frightened the initial exchange between socrates and thrasymachus thus appears to be hostile in the argument that follows, socrates.
Thrasymachus’ role in his debate with socrates is also seen as showing the limits of the socratic method because thrasymachus does not acknowledge that justice is a virtue, socrates is unable to move forward in the discussion. All this serves as an introduction to thrasymachus, the sophist we have seen, through socrates’s cross-examination of polemarchus and cephalus, that the popular thinking on justice is unsatisfactory.
In the first book of the republic, thrasymachus attacks socrates' position that justice is an important good he claims that 'injustice, if it is on a large enough scale, is stronger, freer, and more masterly than justice' (344c. Socrates counters by forcing him to admit that there is some standard of wise rule — thrasymachus does claim to be able to teach such a thing — and then arguing that this suggests a standard of justice beyond the advantage of the stronger.