The article reflects on the meaning of the word aggressiveness and its relation/function in the constitution of the human psyche. It also analyzes a historical perspective of collective and individual manifestations through the first hominids to the present day. Differentiating violence from aggressiveness to include the studies of the forms of acting in the world. Referencing authors such as Sigmund Freud and Melanie Klein to differentiate the nuances of aggressiveness. When there is pathological aggressiveness, when there is salutary and the intermediations of these. It is possible to notice that aggressiveness takes on a constructive character on the one hand and a harmful character on the other. The understanding of the usefulness of aggressiveness passes through a social, moral and intellectual constitution.