Why men are more agressive than girls?

It's partly biology and partly how boys and men are raised.

Testosterone plays a role. Boys and men have higher levels of testosterone than girls and women, and testosterone is linked to higher levels of physical aggression. That doesn't mean testosterone makes someone aggressive, but it can make certain reactions more intense.

The bigger factor is probably socialisation. From a young age, boys are often taught (or allowed) to express frustration physically. Fighting, roughhousing, and being competitive are often seen as normal boy behaviour, while girls are more likely to be told to calm down or talk it out. Over time, boys learn that physical aggression is more acceptable for them than it is for girls.

It's also worth knowing that aggression doesn't only mean physical violence. Girls can be just as aggressive, but it often looks different. Things like excluding people, spreading rumours, or manipulating friendships are forms of aggression too. They're just less visible.

Not all boys are aggressive and not all girls are passive. These are patterns, not rules. How someone handles anger and frustration has more to do with their upbringing, their personality, and what they've been taught than with their gender alone.

It is partly to do with hormones and partly to do with how boys are raised.

Boys and men have more testosterone, which is linked to physical aggression. But testosterone does not make someone aggressive on its own.

The bigger reason is how boys are brought up. From a young age, boys are often allowed to be rough or physical, while girls are told to calm down. Over time, boys learn that being physical is more acceptable for them.

Girls can be aggressive too, but it often looks different, like excluding people or spreading rumours.

Not all boys are aggressive and not all girls are passive. It depends more on how someone was raised than on their gender.