Peter Singer and Gary L. Francione, contemporary philosophers, espouse the term speciesism by referring to ethical theories that somehow deprive the interests of other species, depriving them of the scope of morality, and provide solid arguments, each one in your own way, in favor of an extension of our moral community to beings of another species. Singer defends a consequentialist approach, more specifically, preference utilitarianism. Francione, in turn, adopts a deontological perspective, based on rights approach. There is, in general, a natural tension between these two normative theories due to the fact that one is based on the defense that the foundation of our moral obligations and the corr...