Personality development refers to the gradual formation of an individual's characteristic patterns of thinking, feeling, and behaving. It is a continuous process influenced by biological, psychological, social, cultural, and environmental factors. In casework and counselling, understanding these factors helps social workers assess clients' problems, identify strengths, and design appropriate intervention strategies. Since every individual develops in a unique social context, personality is the result of the interaction between inherited characteristics and life experiences. Heredity is one of the primary factors influencing personality development. Genetic inheritance determines physical characteristics, intelligence potential, temperament, and certain emotional tendencies. Some individuals are naturally calm, energetic, shy, or emotionally sensitive due to inherited traits. However, heredity only provides the foundation, while environmental experiences shape how these traits are expressed. In social work practice, recognizing inherited tendencies helps caseworkers understand individual differences without making deterministic judgments. The family environment plays a vital role in shaping personality. Parents and caregivers influence children's emotional security, self-esteem, values, attitudes, and behaviour through their parenting style, communication, discipline, and affection. A loving and supportive family encourages confidence, emotional