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THEORY OF DEGENERATION AND AUTHORS Rosiou E, Sgantzos M, Abatzoglou G, et al. HEREDITY OF DISCLAIMER The presenter is not officially affiliated with the presented work. MENTAL ILLNESS ABSTRACT The concept of progressive hereditary degeneration, which significantly influenced medical, particularly psychiatric and in turn social thought of the second half of the 19th century, was articulated by Bénédict Augustin Morel. The distinguished French psychiatrist developed the theory of degeneration and created the nosological framework of the heredity of mental illness in order to explain the more frequent psychoses and nervous disorders. In the absence of patho-anatomical findings, Morel attributed these phenomena to hereditary causes. His theory was the first attempt to interpret insanity, mental disorders, and criminality, across generations, and formed the basis for the further development of psychiatry. It had a notable influence on many scientific disciplines of the time, such as criminology, anthropology, biology, and general pathology. It would later result in the emergence of eugenics, which raised several moral issues and would ultimately be used in many ways to justify segregation. Morel was mainly influenced by the monogenetic degenerative theory and believed that social progress could be achieved by the coupling of psychiatry, a social medicine, with philosophy and Christianity. INTRODUCTION In the 1830s and 1840s in France, medicine came under fire for its failure to deal with the cholera epidemic that broke out in 1832. It therefore had to redefine itself after the Revolution of 1848 and develop a strategy to address the new challenges of industrialisation. The mortality rates, the social relations, and the dissatisfaction felt by many as a result of the economic crisis and the political conflicts of those years had to be studied and solutions had to be proposed. Psychiatry, as a social medicine, would be the answer to all these problems together with philosophy, Christianity, and anthropology, with the common goal of physical, spiritual, and mental improvement, especially of the workers, and the preservation of order. Morel’s theory was the first attempt to interpret insanity, mental disorders, and criminality, across generations. Mental illness was, for him, the result of pathological phenomena and could be inherited, leading to the degeneration and eventual extinction of the generation. Morel would describe the term "degeneration", a "morbid deviation of the species", including the concept of a pathological transformation that occurs in the perfect man, as God had created him at the beginning of time, in his primitive archetype. OBJECTIVE METHODOLOGY The study aimed to understand Morel’s Theory of Degeneration and its implications for Medicine at the time, along with its lasting impact on public Extended review of the literature opinion and social policy, as well as to examine the factors affecting the Translation and thorough examination of Morel’s work manifestation and inheritance of mental disorders. Cases of two RESULTS degenerate cretinous 1. Causes of Degeneration women due to the Morel's central idea: Degeneration is caused by a mix of hereditary and environmental, social and moral factors. Major contributors: condition of the soil - Intoxication (alcohol, opium, hashish, etc.) loamy and calcareous Living conditions: poverty, overwork, unhealthy housing, and poor hygiene. - of the Meurthe area Diseases and environmental factors: malaria, epidemics, poor soil, air, and food quality. where they lived. Social issues: immorality, lack of education, and sexually transmitted diseases. They have common Work-related exposure to toxic metals (lead, mercury, arsenic, etc.) features in their 2. Degeneration and Heredity physiognomy, mental 1.Morel proposed a progressive hereditary degeneration: 1st generation: Immorality, alcoholism. state, rachitic 2nd: Manic behavior, mental illness. deformity, and 3rd: Depression, suicidal tendencies. reproductive 4th: Mental retardation or idiocy, leading to extinction of the line. incapacity. Manifestations: Both physical deformities (e.g., abnormal skulls, stunted growth) and mental dysfunctions (mania, paralysis, dementia). 3. Role of Intoxication Chronic use of alcohol and narcotics leads to organic and mental deterioration. Degeneration often begins with neurological damage and culminates in mental illness, passed down through generations. CONCLUSION 4. Medical and Social Implications Morel advocated: Bénédict Augustin Morel's work was the first significant Medical treatment of intoxication. attempt to understand mental illness. Combining Moral reform, starting at the family level. principles of biology, anthropology, medicine, and Social mechanisms to prevent reproduction by those affected. philosophy together with the belief in the existence of a He considered those in asylums a public danger due to inherited and unrestrained impulses. primitive perfect human model, the French psychiatrist 5. Crime and Degeneration developed the theory of degeneration, with the aim of Many criminals were considered incipiently insane, driven by hereditary and environmental degeneration. improving the physical, spiritual, and mental state of He linked juvenile delinquency with inherited criminality and physical deformities. 6. IMorel's theory shaped 19th and early 20th century psychiatry, linking heredity with mental illness. human societies and maintaining order in them. By His work influenced the classification of mental disorders (e.g., "démence précoce" → Kraepelin’s dementia praecox). creating a nosological framework, in which he He laid the groundwork for the biological model of mental illness. mentioned the causes as well as the internal and 7. Connection to Eugenics external signs of mental disorders, he gave prestige and Morel’s ideas helped pave the way for eugenics. validity to the then-new branch of medicine, psychiatry. Eugenics aimed to control human reproduction to "improve" society. The belief that mental disorders can be inherited This led to coercive sterilization, institutionalization, and later, Nazi atrocities. influenced social policy in the 19th and 20th centuries in Although later discredited, the theory of degeneration left a lasting societal impact, including prejudice against those many countries of the Western world. The degenerative seen as physically or mentally “abnormal.” framework proposed by Morel became a cornerstone for 8. Modern Relevance Contemporary genetics validates some of Morel’s ideas: mental illnesses are heritable. the eugenics movement, which appropriated his ideas to Current research seeks to understand the interaction of genes, environment, and phenotype, echoing Morel’s early justify selective breeding, institutionalization, and the holistic approach. marginalization of those deemed biologically unfit. 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