Romantic partners and bosses aren’t the only people who can have narcissistic traits.

Sibling conflict is as old as the family itself. From Cain and Abel to modern reality shows, clashes between brothers and sisters remain a defining and often distressing aspect of family life. Whether ...

DEAR ABBY: My parents divorced when I was 4. I've had a problem with insecurity and jealousy for as long as I can remember. I have two older sisters who are twins and a half-brother my stepmom and dad ...