Why is it always young men? Is testosterone poisoning a problem?

[aint_no_life_nowhere]

58. Drive by shootings in the inner city don't distinguish between race or gender

nor do shooting sprees in asian restaurants or bars. I was the unfortunate bystander in an asian bar where a crazy young man sprayed the interior with bullets, one bullet passing just in front of my nose. Fortunately, no one was killed but the guy standing next to me ended up on the floor on his back in a pool of blood, shot through the chest.

And there certainly are European serial killers. They don't usually make the news in the U.S. Didn't we have a killing spree just a few months ago in France where an insane man killed five people including Jewish children outside a school? According to wikipedia, 21% of all serial killings occur in Europe. While it's true that three-fourths of all serial killings occur in the U.S. I would bet that this can partly be attributed to the fact that we have far fewer statistics in third world countries on this phenomenon.

As I mentioned in my original post, I'm not discounting the role of culture and environment, but I can't see how we can eliminate the role of hundreds of thousands of years of evolution as one of the causes of male violence, whether it's 18th century dueling, 19th century gunfights, or 21st century drive-bys or theater shootings.