IE: The Pyramids were more akin to the Great Cathedrals across Europe: 100 or 200 year projects completed by generations of engineers, architects, and artists. Not necessarily the elites of society... but at least those with free will. Some motivated by Religion, others motivated by simple glory and the joy of building great things.
I think people think that Egyptian Slaves built the pyramids... Sometimes people think they were Jewish Slaves: some time between Joseph and Moses in Biblical times. But if they were simple slaves, why were the workers of the Pyramids buried either near, or even within the Pyramids? This was a great honor that was normally reserved only for Pharaohs!
http://news.discovery.com/history/ancient-egypt/pyramids-tom...
Without changes in how people live, a star trek economy, or large numbers of people choosing to not reproduce, we might over-convert the Earth's resources into finished components of our inane, evolution-driven desires.
Perhaps a far-future goal could involve evolving our minds and activities beyond our evolutionary orientation, yet still be able to somehow retain them to respect our history, or just our strange beauty?
For example: what if the priority of a small segment of the population becomes putting maximum resources into some long-term project which only benefits that group? 90% of the population could be directed toward working on that massive project, by delusion, coercion, or other methods. The pyramids of Egypt and North Korea now are smaller-scale examples of this.