The Utilitarianism is a doctrine of ethics which prescribes to act (or no act) in order to maximize the overall well-being of all sentient beings. Utilitarianism is a form of consequentialism. It evaluates an action (or rule) solely in terms of its consequences that distinguish moral deontologists including moral Kantian (Mabel 2003, 32). The premise of the utilitarian theory is that good ethics is an observable and demonstrable reality. It can be defined only from the basic motivations of human nature, his natural penchant to pursue happiness, that is to say a maximum of pleasure and minimum pain. This principle is formulated by Bentham which states that Nature has placed mankind under the influence of two masters, pain and pleasure. This tells us what we have to do to determine what we will do. On the one hand, it determines the criterion of good and evil, and on the other hand, it tells about the chain of causes and effects which are attached to their throne.
We can summarize the heart of the utilitarian doctrine by the sentence; always act in such a way as to result in the greatest amount of happiness (principle of maximum happiness). It is therefore a moral eudemonistic but, in contrast to the selfishness, insists that we must consider the welfare of all and not the welfare of single agent actor. The utility thus becomes the pivot of reasoning ethical, and its direct application is that different welfare states are comparable depending on the level of overall utility generated by them, understood as the degree of aggregation utility achieved by individuals. It is a doctrine of moral obligation because, in the face of different perspectives of action, requires choosing the one that produces more wealth, the moral value (an act has moral value if it produces well-being), is prescriptive because it tells men what they must do, but can also be descriptive because it tries to show the inner motivations that drive men to action: the pursuit of well-being or happiness. In a contemporary, utilitarianism is generally characterized by consequentialism, from welfares', axiom order sum to be maximized according to which the sum total of individual utilities of the parties involved and is distinguished by its universal character because the utility maximized to benefit the largest possible number of individuals. Finally, utilitarianism is a doctrine monistic, ...