New Delhi: A new study has found that the common syndromesof severe mental illness, such as schizophrenia, bipolar disorder,dementia, obsessive-compulsive disorder, and addiction, may have anunusual evolutionary basis. The constant prevalence of mental illness across the history of the humanspecies suggests a Darwinian paradox. Despite causing significant disease,there seems little impact on selection for fitness. […]
Low fitness levels also predicted a 60 per cent greater chance of anxiety, over a seven-year follow-up, according to the findings published in BMC Medicine.