No reason in mexico. It was hilly (understatement for peru), a boat was more practical for moving stuff, but that's general for everyone.
Roads require vast amount of work to establish and maintain. The tribes of north america couldn't pull that off. The aztecs had roads, but cargo transportation was best for water ways. If not either? Slaves.
IIN I have this opinion on aliens visiting our planet?
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No reason in mexico. It was hilly (understatement for peru), a boat was more practical for moving stuff, but that's general for everyone.
Roads require vast amount of work to establish and maintain. The tribes of north america couldn't pull that off. The aztecs had roads, but cargo transportation was best for water ways. If not either? Slaves.