Part 1 of Essay
Ralph Waldo Emerson once wrote “One man’s justice is another’s injustice.” This statement quite adequately describes the relation between definitions of justice presented by Polemarchus and Thrasymachus in Book I of the Republic. Polemarchus initially asserts that justice is “to give to each what is owed” (Republic 331d) ....

Part 2 of Essay
.... friends, and through their benefit he benefits, what makes them happy pleases him. Upon the summation of the debate between Polemarchus and Socrates, Thrasymachus enters into the fray. He states that justice “is nothing other than advantage of the stronger” (Republic 338c), and also that the greatest life is that of perfect injustice, to be found in the life of a tyrant. This definition leaves no room for the common good because it creates a life of competition and materialism, where only the strong survive. ....