Abstract

According to development of biology, particularly in the field of evolutionary biology, this science claim presented scientific explanation about human phenomena, including religion and ethics. About the origin of moral behavior in humans, a group of evolutionary biologists believe that ethical behavior in human beings has developed during evolutionary process over time while the other group of them believes that there are many differences between animals and human in ethical behaviors. In this paper we will talk about the altruistic behavior as a moral behavior and views of two groups of biologists will be reviewed. We have discussed around two subjects: biological explanations could not present meaningful difference about the nature of ethical behavior in human and animals; and, human nature necessitated a special kind of finality in human being’s moral behaviors.