A sample of 4,013 participants from 24 countries were asked about aggression toward siblings and non-sibs, to determine ...

If you've ever had to grit your teeth during rush hour traffic or hold your tongue in a work meeting, you know just how pervasive feelings of aggression can be. We've all been there. Anger is one of ...

Decades of research with humans and other species indicate that males are more aggressive than females. But within the family ...