On average, men are indeed more aggressive than women. One reason for increased aggression in men is testosterone, a hormone that is linked to aggression.
Men have a lot more testosterone than women. But, aggression is not just hormones – it’s a complex behavior that is influenced by personality, parental discipline, life experiences, etc.
So, naturally, there will be individual differences – some women may be quite aggressive, while some men may be incredibly laid-back and abhor violence.