Edited sentence: A criticism might be that the whole movement makes the case that schizophrenia is caused by childhood trauma.An alternate view, which suggests that the diagnosis of schizophrenia is not a valid or reliable diagnostic concept  is now being considered much more seriously by mental health practitioners and researchers alike.However, a key point for the movement is that they are valid in that a part of the voice hearer's psyche is externally manifested in the voices and a lot can be learned from them.However, the movement doesn't state that childhood trauma causes schizophrenia.Past trauma often influences the evolution of the voices, but not always.Rather than living in fear of the voices and trying to suppress them, the voice hearer is encouraged to engage the voices and, by doing so, to learn more about him or herself.Sometimes they can be positive.The general consensus in the medical community is that predisposition to schizophrenia and other common mental disorders is caused by genetic and chemical anomalies.The philosophy of this movement is that there are people who are wired to hear voices - "voice hearers" - and that those voices have personal meaning to the voice hearer.The voices are a real auditory manifestation for the voice hearer.They might be labeled invalid by non voice hearers in that there is not another person generating the voices apart from the voice hearer.To complicate things, in recent years there has been a significant body of literature challenging the traditionally accepted view that schizophrenia is a genetically determined brain disorder