We still use soil and water. But we not have machine harvesters
I would strongly suggest indaba. It allows each country to be heard and they can come to a conclusion quickly. They can only voice their opinion in a certain way. A country gives their Red Line in a diplomatic way and the other can respond with their hard limits.
It lasted around 600 years. The Louisiana Caddo wanted to moved southwest to live with others of the tribe in Texas.
A federal government and a confederate government differ in where the majority of the power lies. In a federal government the central government holds the most power and states have less. In a confederate government the states hold the majority of the power. The Confederate States of America acted as sovereign states with each state having little influence from a more powerful central government.
Enslaved Natives. Because at the time they were unaware that the natives didn't have immunity towards their diseases and were very unskilled at maintaining the crops the Spanish wanted.