Ethics can be understood in a simplista way as the science of the moral, being the set of moral principles that conduct the rights and duties of an individual or an organization, as one determined group, etnia or sector of work (Lima and Mato, 2006). Etimologicamente, we have two definitions of ethics (University Catholic of Brasilia), namely: Ethos as custom: way of being that it proceeds from the common experience of the principles, values, norms, laws and habits that express the idea of GOOD (universal) partilhada by the members of a collective (community, people, etnia, civilization etc.). Ethos as habit: constancy in acting of an individual by means of which this incorporates its personality that ideal of GOOD (virtue) and the effective by means of action. According to these authors, Lima and Mato (2006), amongst others, the main objective of the ethics is to teach the man to act correctly. The man would not only want to live, but still to live well.

Thus, the man it would have to search norms ethical in order not to diminish itself, but to grow in all the aspects, the all existencial set of its (Lima and Mato, 2006). Although, to the times, it must sacrifice some element of its being, in order to remain itself in the standards of the group where it coexists. According to Pegoraro (2006), the ethical investigations are old and had suffered to mutations in elapsing of these 2500 years of history. In old Greece, the nascedouro of the ethics is the nature human being, who if also presents in the natural laws or by means of the deities. In the Christian age, this natural origin was kept, and added it divine creation of the universe and the man as workmanships and creatures of God. Therefore, the last source of the ethics leaves of being the nature and starts to be the perpetual law.