Not at all. I don't see human history as a fall from peace so much as a struggle upward from a constant state of tyranny and war.
There are whole civilizations now that haven't known tyranny for generations. Where the last invasion is almost out of living memory. Where they try to only go to war for good, moral reasons.
I mean, to come back to the main topic . . . these days, we sometimes settle serious, international disputes by breaking each others' machines.
Sad? No sir. The 21st century is pretty damn awesome by historical standards.