believe that the purpose of morality is to make life better by increasing the amount of good things (such as pleasure and happiness) in the world and decreasing the amount of bad things (such as pain and unhappiness). They reject moral codes or systems that consist of commands or taboos that are based on customs, traditions, or orders given by leaders or supernatural beings. Instead, utilitarians think that what makes a morality be true or justifiable is its positive contribution to human (and perhaps non-human) beings.