We sometimes think (in our age of progress) that if we look back, we must see very primitive creatures.
But even if we go back ten thousand years, we don’t find primitive humans. We find modern humans. Genetically, we have not changed very much in 10,000 years. What has changed? We have learned a huge amount of chemistry, biology, etc. Of course we didn’t know which bits were useful. It took a hundred years to figure out. That’s how science works.
The discoveries of past centuries created some rapid changes. Example of progress: within a few hundred years we went from knowing what gunpowder was, to seizing guano Islands, to synthesizing ammonium nitrate to nuclear weapons.
Ancient impulses with modern weapons are weird. I have this picture in my head of an angry person saying “I’m going to get that guy. I’m going to go lay claim to a guano Island, refine potassium nitrate, make black powder, and use an explosion to propel a small metal ball through his body.” Then the pre-modern human says “I’d just hit him with this rock. Simpler.”