John Stuart Mill suggests that a person’s ethical decision-making process should be based solely upon the amount of happiness that the person can receive. Although Mill fully justifies himself, his approach lacks certain criteria for which happiness can be considered. Happiness should be judged, not only by pleasure, but by pain as well. This paper will examine Mill’s position on happiness, and the reasoning behind it. Showing where there are agreements and where there are disagreements will critique the theory of Utilitarianism. By showing the problems that the theory have will reveal what should make up ethical decis