Monumental Record: the lives of the workers building the Great Pyramid of Giza

I see! I think you're right that change has been very fast recently, very much faster than anything innate about us can change, and of course that post-Renaissance Europe was in many ways very similar to Classical Antiquity. That's why it was called the "Renaissance", after all.

But there was a fairly sharp break between Late Antiquity and the Dark Ages, which I don't think is really arbitrary, except in the sense that it was only a local phenomenon and so only appears if your focus was Europe. It wasn't as big a change as the last century or two has been, but it was a big change. The progression of the Middle Ages was much more gradual, but it too eventually produced enormous changes, and certainly the Reformation and the consequent introduction of the Westphalian form of state were enormously consquential.

My great-great-grandparents were probably born around 1860, mostly in the US. So not only had they heard of governments, they knew about democracy and literacy, though some of them probably weren't themselves literate. They traveled and shipped goods by railroad, which was of course made of metal smelted from stones. They bought and sold things with coins and even paper money (though not fiat money). Some of them probably drove cars, though I've only heard definite stories of their children, my great-grandparents, doing so. Some of them made phone calls. Glass was mass-produced in their lifetimes, though greenhouses were still only for the rich, and steel-framed skyscrapers were built. They knew many illnesses were caused by "germs". Hot-air balloons were a century before their births; some of them may have lived to see not only heavier-than-air flight but also the Great War. I don't know if any of them ever underwent anesthesia, but it became widespread for surgery in their lifetimes.

So, I don't know that it's true that I can relate to Merer as well as to my great-great-grandparents. Merer didn't have iron, coinage, flight, germ theory, anesthesia, mass production, and so on. He probably didn't know the Earth moved or that the stars were suns. He might not have known the Earth was round. Even the Polynesians hadn't yet learned to navigate over open ocean. He didn't have wheeled vehicles; chariots would be introduced centuries later by the Hyksos.

You're right in that really effective innovative leaders are rare.

Still... I am not familiar with many examples of cases where the leader was removed and not replaced and things didn't fall apart.

I would like to see more experimentation in this area though. We don't experiment nearly enough with social structures.

Another example, only very slightly later, is this:

http://www.globalegyptianmuseum.org/record.aspx?id=14910

It's somewhat rare to find such realistic depictions in ancient art and I find any such works extremely arresting.