To promote the value of human life from conception / fertilization, it is necessary to settle firmly in the concept of human nature. From the biological to the spiritual aspect, the nature of the person cries out for the continuity of “entity” from the parents to the children.The concept of person, its origin, its founding characteristics, the criterion of dignity will be treated and it will be reflected in the paradoxical possibility of doing evil, wanting a good, apparently.It is a tight synthesis of the philosophical reasons why nascent human life has to be protected and protected.It has taken time to recognize the value of the human person, founded on their dignity. However, the cognitive and volitional "atrophy" that man suffers makes today a truly titanic task to maintain that human life is worth since its inception in conception / fertilization. The increasingly widespread pre...