Catherine Carr told Newsweek birth order isn’t destiny, but environments—siblings, gaps and resources—can shape identity.

Birth order theory is a concept in family dynamics psychology that posits sibling position may influence personality traits.

How does being the oldest child influence who you become? Explore birth order psychology and uncover the common traits of ...

Can birth order shape who we become? The theory that our position in our family might affect our character development began in earnest with Alfred Adler, a contemporary of Sigmund Freud. He proposed ...

We've all heard it before: The oldest child is responsible and driven, the middle one is the peacekeeper, and the youngest is the fun-loving rebel. It sounds neat, maybe even a little true when you ...