Dec 18, · Sibling rivalry traces its roots back to early childhood when siblings compete with each other for their parents' love and attention. Although it is common to feel threatened by this competition in childhood, it often continues unresolved into adulthood, according to Elizabeth Bernstein, author of "Sibling Rivalry Grows Up.". Since few people today see sibling bonds as a central aspect of adult life, it’s often easy for someone estranged from a brother or sister to cover the disconnect by citing geographical distance.
While few adult siblings have severed their ties completely, approximately one-third of them describe their relationship as rivalrous or distant. They don't get along with their sibling or have. Reasons for Adult Sibling Rivalry Sibling relationships are complex and influenced by a variety of factors including genetics, life events, gender, parental relationships, and experiences outside of the family. Parental favoritism is often cited as a source of adult sibling rivalry.