Many Defintions of Justice

The Republic initiates an argument on the true definition of justice. The reading shares different types of views between Cephalus, Polemarchus, Thrasymachus and Socrates. I believe that all of their individual points are correct to some extent. For example, Cephalus claims that "paying people what they're owed and properly discharging one's obligations" is justice. Although justice is not limited to a business-like approach, the sole action of compensation is a just action.. Also, completing one's duties seems a more just action than not doing at all. Polemarchus claims "justice is doing good to one's friends, and harm to one's enemies". It can be argued that if that friend is a just or sincere human being, then doing good to him/her seems a fair idea. Furthermore, harming a bad person for malicious intent, (ie. robbing) by form of a prison sentence seems correct. Thrasymachus believes justice "is the advantage of the stronger," and that also depends on perspective. Politics and business encourage aggression and destroying weaker competition. As some say, business is business, and few people see anything wrong or unjust about these morals.
In conclusion, Plato found a way to invalid the statements of all of these gentlemen, but I believe justice depends on perspective. Not everyone leads the same lifestyles or come from the same backgrounds, so that leads to different theories on the matter. In essence, there are many definitions of justice, and all deserve to be taken into account.