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 ...

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

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