By example our ancestors built pyramids , cathedrals , and many others prodigious thing without our present economical system.
Economics? Or technology? Either way, those things were built with a very good understanding of what they were being built for, and what they needed to accomplish. That's why they're still around today.

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I'm like one of those idiot savants...well, except for the savant part.

"A long time ago, yet somehow in the future"