This study shows an analysis of the prehistory of the concept of causality in Freud, since his studies with Charcot, in 1885, until the work "The interpretation of dreams", in 1900. It was verified that the function of causality could only be consolidated in Psychoanalysis if Freud would have abdicated to the principle of cause in Natural Sciences. Both the statement of a sexual perturbation in current life and the scenes of a supposed traumatic seduction should be reformulated so that, in Psychoanalysis the problematic of cause is always referred to a question elicited by desire.
Causality; Etiology; Psychoanalysis; Freud