The causes of mental illness are generally understood through four broad lenses: 1. Biological: Genetic predisposition or irregularities in brain and nervous system function may play a role. 2. Psychological: Unresolved emotional conflict, distressing childhood experiences, or distorted, irrational thought patterns can contribute. 3. Relational/Family: Family dysfunction, lack of support or affection, neglect or bullying growing up, and poor social skills or isolation are often significant factors. 4. Sociocultural: A person's social class, gender expectations, cultural values (such as an emphasis on competition and achievement), and broader societal pressures also shape how they experience and cope with distress. Each of these explanations captures part of the picture, but relying on just one tends to oversimplify things. Most researchers today agree that mental illness usually arises from the interaction of biological, psychological, relational, and sociocultural factors together, rather than from any single cause alone.