Sibling estrangement can be a wrenching, devastating experience, as a brother or sister must adjust to life without a crucial family member. Or, if the relationship was toxic, it can be liberating.

You spent your childhood with your parents and siblings—maybe even a cousin or grandparent—but can you honestly say you know who your relatives are as people? The truth is, you probably didn’t bother ...

You and your siblings may have grown up in the same house and shared the same parent or parents, but that doesn’t mean you experienced those first chapters of life in the same way. Maybe you were ...