Mill believes that utilitarianism to become a real way of life it is necessary to define justice within this main idea. Therefore, Mill begins to define justice first through defining what is unjust. He defines the unjust actions through five different main ideas, it is unjust to: deprive someone of their legal rights, depriving someone of something they have a moral right to possess, obtaining something that they do not morally deserve, violating an agreement with someone else, and showing favoritism to someone under inappropriate circumstances (Mill 44-45). Mill defines injustice to allow us to understand justice better.
After explaining what is unjust, Mill follows the idea of justice through history. By speaking of how each of the different ancient cultures understood justice, Mill believes that he will eventually reach what the definition of justice is. The groups most examined by Mill are the Greeks and Romans. These ancient peoples eventually recognized that although their idea of justice was simply following the law that because, “their laws had been made originally, and continued to be made, by men,” it was entirely possible that there were bad laws that had been made (47). Because of these bad laws it may become necessary to break them in certain situations. This idea of justice was also followed by Mill through Christianity; one of Christian’s main sources of law comes from the Ten Commandments which explicitly states that one should not lie. However, going back to a situation Kant used, if a life is endanger through the utilitarian idea of finding the greatest good for the whole community one should at least mislead the person because it is important to keep the good of all people in mind, because to keep a life will most likely help a community more than losing a life.
Through his examination of past cultures, Mill comes to the conclusion that the justice in its lowest form is following the law and being punished for breaking those laws. However, as he continues to write, Mill decides that justice is different for each and every person because the definition of utility for each person changes. In the end, justice seemingly coincides with the idea that every person being an individual must simply hope that they can work for the same ultimate goal of a communal happiness which would allow for justice to be found within the entire community.
Mill’s understanding of justice is so drastically different from both Kant and Aristotle, is it possible that each person must find their own, individual definition of justice, but that this definition must be in harmony with others in the community? Or do Kant and Aristotle’s definitions work better because they allow for a more rigid understanding thereby allowing everyone to have the same definition? In the end, I believe that each individual should find his or her own definition but still have a clear idea of justice in society also.