Our Stone Age Past.
We read in books how back before history was recorded, life was brutal and short: uncivilized in fact. There was a progression through time from hunting and gathering groups to agricultural communities to political empires and industrial societies. The implication is that things get better along the way: more refined, in step with more complex.
Those brutish people back in the stone age: artists, part of nature, no concept for genocide, no words for war. That must have been hell back then!