I'm not sure what is funny about pointing out how much of your post was completely unrelated to caterpillars, but whatever.
If you are wondering how the Egyptians built the pyramids, here are a few links:
http://www.sciencedaily.com/releases/2008/03/080328104302.htm
http://en.wikipedia.org/wiki/Egyptian_pyramid_construction_techniques#Different_kinds_of_ramps
Since I'm guessing your question centers on how the heavy blocks were moved, the simple answer is mechanical advantage -- levers, ramps, and pulleys, pretty basic stuff.
Even though human intelligence may have declined slightly after the Industrial Revolution due to reduced natural selection, the gains of education, nutrition, and specialization have more than made up for said losses.
http://www.apa.org/monitor/2013/03/smarter.aspx
Though the fossil record is, in fact, the weakest link of evidence for human evolution, its proof is still pretty apparent. (Even in Wikipedia)
http://en.wikipedia.org/wiki/Human_evolution#Evidence_from_the_fossil_record
Genetic similarities and embryonic development are far stronger supports for common descent, and I advise you to research them.
I have no idea what you mean by this statement. Are you referring to Leonardo da Vinci?
And we are indeed building on the backs of our ancestors, and we get smarter and better at building continually.
However, NONE of this is topical to the evolution of caterpillars.
Mathmatically it is more efficient than complete randomness and less efficient than intelligent design.
This is because natural selection selects for effective traits and against noneffective ones, rather than pure luck.
What you need to understand to make sense of this conversation is that metamorphosis is NOT evolution.
Evolution is a multigenerational process where DNA of offspring is changed by natural selection.
Metamorphosis is a monogenerational process where one creature goes through a cycle of life without changing any DNA or producing offspring whatsoever.
The two are completely different processes and cannot be confused.
The reason metamophosis evolved is because creatures with a variation in their life cycle that made them more likely to reproduce survived better, not because metamorphosis is some kind of Insta-Evolution.
The reason humans and insects have different life cycles is because different life cycles are preferable for different creatures and environments.
You question whether caterpillar DNA could have arisen from primordial Earth whatsoever, which is abiogenesis (and thus not directly evolution). However, it still merits response.
Caterpillar DNA did not DIRECTLY arise from the primordial soup. Instead, over billions of years, proto-cell DNA did, and it evolved into more complex organisms, which eventually moved onto land and became insects, one of which became the caterpillar.
You say that "the ape folk seem to have lucked out [in contrast to caterpillars]" although "apparently they all originated from a common spot."
You assume that humans are inherently better than caterpillars. While we are more complex, we are not inherently better. We are simply suited for a different biome and life than they are, and so have different DNA and developments. This isn't some kind of race to become civilization-level creatures; it is natural selection for those organisms which can survive best in their current conditions.