Jayle, note that I did not say the simple ancient cults being incapable of undertaking large scale building projects. Egyptians, Minoans, Sumers, Babylonians... But in all these cases we are talking about a developed civilizations with intensive urbanization and agriculture, well-structured power systems and control position of the priesthood as keepers of Knowledge, including Engineering knowledge. As I mentioned they had MONEY and all associated infrastructure - treasuries, budgets, taxes, records, archives, files etc.
But in Nazca we have a primitive culture with highest technological achievement as early post-neolithic ceramics with no glaze, not a civilization.