There is such a thing as male aggression. You can observe it in animals. If you keep small pets such as mice, it is usually recommended to keep two females, as the males will fight among each other. It is likely that such a tendency towards violence exists in human males, too.
(Yes, it is encouraged by society, but at one point, society was invented, right? They didn't just throw a coin and decide to bring boys up to be violent.)
In humans, yes, childhood does play a role, but it is not like all male criminals had an oh so terrible childhood, it is more like the parents did not, or could not, make enough of an effort to teach them that aggression is not okay. (If you live in an environment where all other parents teach their sons to be aggressive, it's a lot of work to try to counteract that - it is like the pinkification of girls, only, you know, much more dangerous and horrid.)
Boys can be perfectly pampered only children and still turn out horrible - there are studies on criminals reporting less abusive childhoods if you use a lie detector, so ....
Society needs to be more aware of the problem of male violence. Programs that aim to tackle the problem have often been rather successful - and this is not 24-hour-intervention, it is things with social workers that takes perhaps a few hours a week.
Men do have a natural tendency to turn bad, but that's a) not an excuse, they should go to prison if they're criminal, period, and b) it is not something we just have to accept. It can be counteracted.