Frank Sulloway

Frank Sulloway is a psychologist known for his research on personality development and how family dynamics influence individual traits. He proposed that siblings influence each other and that birth order affects personality differences; for example, firstborns tend to be more conscientious and authoritative, while later-born children are often more rebellious and open to new ideas. His work highlights how family roles and experiences shape who we become, emphasizing that personality is partly molded by our position within the family structure.