417 interconnected Mayan cities discovered in Guatemala dating back to around 1000 BC.

[wnylib]

12. "Harmony with the earth" depends on which indigenous culture

you speak of. Civilizations that were built up like the Mayans, Aztecs, and Incas, not so much. It was the tribal societies farther north in North America who were more harmonious with nature. That was necessity because they were more closely dependent on nature than people who lived in the cities of empires. Tribal societies were more conscious of the sources of their food, water, and shelter and of the need to respect them, which is reflected in the religious beliefs of some tribal nations of North America.

As for harmony with each other, indigenous people of the Americas, whether tribal or living in empires, made war on each other, and developed alliances and trade agreements like any other people. There were established customs of diplomacy that the majority of tribal nations followed, similar to our own diplomatic customs. Diplomatic delegates were supposed to be immune from attack or killing regardless of any hostilities between the nations that they represented. It was expected that they would receive hospitality when on a mission. If they were mistreated or killed while on a mission, which happened sometimes, that was grounds for war in retaliation. Disrespect for diplomatic messengers was one of the causes of hostilities between colonists and Native people in northeastern North America.