There was no significant difference in aggression between males and females before two years of age.

Culture is a factor that plays a role in aggression.

Gender is a factor that plays a role in both human and animal aggression.

It was found that technology and electronic communication has become a key factor in social aggression.

What about the role of genetics in aggression and violence?

The study reported the increases in both aggression and vocabulary were small.

But most of all, they revealed the creativity in passive aggression.

These feelings often result in aggression against less powerful groups.

It shouldn't be that much difference in energy, in aggression.

A very common occurrence during evolution is an increase in aggression.