Why was the Incan city of Machu Picchu considered an advanced civilization?

Many modern-day archaeologists now believe that Machu Picchu served as a royal estate for Inca emperors and nobles. Others have theorized that it was a religious site, pointing to its proximity to mountains and other geographical features that the Incas held sacred

Explanation:

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they required less loading and unloading

explanation:

the shipping container improved shipping because it cut down on unloading time by three weeks, eliminated wasted space, and allowed ships to carry.

deists, human beings can know god only via reason and the observation of nature, but not by revelation or by supernatural manifestations (such as miracles