What makes kids aggressive later in life?

Collectively, the researchers are interested in how these early physiological and temperament profiles might be interacting with empathy, emotion regulation and social-information processing to produce later aggression….

For instance, some children may not experience empathy. They might have perspective-taking challenges that don’t allow them to see themselves in a victim’s position, according to Ostrov.

“Children on the proactive pathway may be fearless and lack empathy,”

he says. “It’s possible they don’t feel bad about their behavior or they may not understand how their behavior is leading to harm.