Og is angry at Zog. He walks over and slaps him.
Next day, Zog picks up a stick and whacks Og.
Conclusion: the world is a more violent place.
The following week Og picks up a rock and pelts Zog.
Zog contrives a sling and zaps Og the following day.
Conclusion: the world is a more violent place.
Og fashions a bow and arrow and rains arrows down on Zog.
Zog escapes and makes a shield and contrives a sword out of flint.
Conclusion: the world is a more violent place.
Og smelts a bronze shield and sword and smashes Zog's flint sword in a duel.
Zog perfects a steel cutlass and bends Og's bronze sword in a melee.
Conclusion: the world is a more violent place.
Og grabs a horse and rides roughshod over Zog before he can respond.
Zog invents a saddle and lance and unseats Og easily.
Conclusion: the world is a more violent place.
And so it goes.
Violence is singular and personal until technology makes it plural and impersonal.
War changed when men stopped looking each other in the eye as they spilled one another's blood on the battlefield.
Technology isn't more violent. Technology is more effective at violence.
That is a distinction with a difference.