It's worth
defining violence, isn't it? If we're talking merely
physical violence I would say men are more violent, by sheer facts of biology - men tend to be bigger and stronger. An average woman simply isn't capable of being as physically violent as an average man,
even if she wanted to.
But what if we include
psychological violence? And is there even such a thing? Or does violence have to be physical?
It seems to me, in this day and age of ridiculously excessive social navel gazing, many of those basic terms are constantly being redefined, making it very hard to discuss something like the OP.
And getting back to the OP, it's worth reiterating that this is not a question of whether men actually
commit more violence, but whether they are more
prone to violence.
So how do you measure that?
I think violent crime statistics are probably a red herring, because you're talking of an uncontrolled situation with a multitude of different factors to take into account. Firstly, worth considering is that domestic violence constitutes a big chunk of violent crime statistics, and there's already some good research indicating that offender statistics for domestic violence (overwhelmingly male offenders) does not reflect the reality (woman either equally violent or more violent than men).
Then you take into account false reporting - New Zealand Police estimate that between 60 and 80% of sexual assault complaints made by women against men are false. However as these are reported crimes, they still count towards statistics.
I'd like to illustrate how distorting statistics can be.
New Zealand has a separate offence category called "Male Assault Female" which is used specifically for domestic violence. There is no "Female Assault Male" category.
Further, very comprehensive and detailed crime statistics are available online for New Zealand.
See here.
Note that sexual crimes are recorded in their own category.
Also note that the statistics I am looking at are for
reported crime. It is important to remember that this does not mean the crime actually occurred, merely that someone said it did. I've already mentioned how high rates of false-reporting are for rape.
There were 56,983 reported violent crimes in New Zealand last year.
It is additionally worth noting that crimes can be violent in nature, but do not qualify as a violent crime (property damage being an obvious one).
Of the 56,983 reported violent crimes, the largest categories were as follows:
Serious Assaults - 20,623 (36%)
Minor Assaults - 14,021 (24%)
Intimidation and Threats - 13,977 (24%)
Moving into Serious Assaults, you will see the category "Assaults By Male On Female" as a distinct category - these are all cases of domestic violence.
Most common Serious Assaults (out of 20,623):
Male Assault Female - 9,593 (46%)
Misc Common Assault - 5,442 (26%)
Assault With Intent - 1,857 (9%)
This indicates that domestic violence is a substantial percentage of violent crime, and is reinforced by statistics in other countries (about 20% of reported violent crime in the US is domestic, 16 - 25% in the UK).
Further worth considering is that statistically violent crime perpetrated by a stranger is more likely to be reported than violent crime perpetrated by someone the victim knows. This suggests that domestic violent crime is under reported compared with non-domestic violent crime.
The end result of all of this is that domestic violence makes up a
substantial percentage of all violent crime.
Once you take into account the discrepancy between reported crime statistics and more detailed studies on domestic violence by gender, what you're left with is a
substantial flaw in using reported crime statistics to assess which gender is more violent.
Looking at domestic violence specifically is useful for answering the OP for several reasons.
1) There is comprehensive studies specifically looking at occurances vs reporting and gender roles in the violence
2) Domestic violence tends to be ongoing systematic violence which is a better reflection of a person's propensity to violence rather than one-off criminal acts
3) Domestic situations are common to most people in most socio-economic situations
4) Domestic violence generally is "violence-only" crime whereas many other violent crime happens in conjunction with or as a result of an escalation of another non-violent crime
In this way, I'd argue that domestic violence situations offer a more controlled situation in which it is easier to assess the natural inclination towards violence of each gender.
While it may be that non-domestic violent crime by males is reflective of greater violence from males, there are so many other factors that can come into it, which require extensive research.
And the research available indicates that women are equally violent
if not more violent than men in domestic situations. I would argue this is compelling evidence that men are not more prone to violence than women.