I will forever say this:
We are not any more violent than the past generations. We could be LESS violent for all we know.
Tom Fulp made some gorish flashes back when he was younger, and if you go to even younger generations, peoplem were fucking violent.
What about the middle ages ? Sword fights chopping people into pieces, guts hanging out...
That`s a lot more violent than making a stick killing another stick. There are many other examples, but the main point is that from a genetical stand point, humans have not changed that much, ergo, their violence potential has not either.