Some years ago, I read a scientific article that compared the number of murders per capita in the stone age to nowadays. The authors came to the same conclusion: stone ages where way more violent than the present.
But I then calculated/estimated based on the numbers in the article and the assumption of hunter-gatherer groups of 50-100 people, that experiencing a murder in your group in that time was a once-in-the-lifetime chance.
I am in my mid-fifties, lived most of my life in a not so poor region in Germany, in a small village, and I know (knew) at least 2 person who got murdered, and a good handful who commited suicide.
And I know personally at least 3 person who committed murder.
My mother was child in WWII, my father even faught in a 'hot-spot' as an 18 year old, I have heard really many first-hand stories about killing.
Furthermore, television is pretending a ridiculous violent world, and I think this does have a really negative influence on peoples mind.
Are raw numbers to be valued more than the well-feeling of the people?
If a fairy would ask me to choose when to live, I would not hesitate a split-second and choose the pre-neolithic.