Reacción a "Peer genes in youth influence future risk of addiction and psychiatric disorders, study finds"

Mental disorders are the expression of the complex interaction, in a given socio-cultural context, of life events, relational experiences with attachment figures, biographical, biological and psychological factors. The definition of diagnoses is the result of the consensus of a group of academic professionals and we do not have objective analyses, laboratory tests or neuroimaging that identify what we call a mental disorder, whatever it may be (and there are such tests for neurological disorders). Nor are there genetic markers that allow for its diagnosis.  

Research into the influence of biological factors on the onset of mental disorders may be of interest, but despite millions of dollars of investment and enormous scientific effort, no biological markers have been found for any mental disorder, and possible individual genetic predisposition has yet to materialise in any relevant finding. This means that the presumed social effects of the estimated genetic load investigated in the article are even more blurred and, in any case, have no significance in clinical practice.