From the first moment the man set up a community and organize a society, giving up many of their rights by making a natural weighting of what is given and received to be governed and to accept the imposition of rules to maintain order and harmony in society, establishing general conditions for reaching a legal right in a social environment that claims to be correct, creating the penalty or punishment for any individual who shatter them. It is there when first appears the offense and with this phenomenon is born the urgent need to analyze its structure, having at all times as a premise that the origin of all that is human behavior to this have been observed since ancient times to our days many discussions that resulted in criminal legal dogmas that is supported on the method of understanding the laws and relies on legal interpretation, even in our times has remained a debate about the theory of crime based on the action characteristic unlawful, and guilty which we will analyze from the perspective of the two most prominent trends in this field, finalism and causalism, establishing their similarities and differences and making a critical analysis of the validity of its postulates and inference in our penal accusatory system. And in the criminal policy of the country.