[Perinatal and infantile roots of the violence--an opportunity for prevention]

The author first recalls the definitions of the concepts of violence, hatred and aggressivity, then underlines the different types of aggressivity which take place in the course of the life and development. Finally, the author points out the role of the current denial of a children's right to "have time to be a child", and the role of depressive maternal or familial surroundings in the later emergence of violence during pre-adolescence and adolescence. This approach provides an opportunity for early prevention of adolescent violence, which constitutes a true public mental health problem.