Possibly one of the most advanced governments in the Americas at the time of European contact.
Really? Is this something new for you? CDNBear has mentioned this over and over again over the last 10 years on here. TB has already mentioned that North American indigenous cultures have ran the full gambit on government forms, From the above to despot rulers. No different than Europe.
What can Euro-Canadians learn from the Great Law of Peace?
Well there was nothing to learn from the great law of peace.
Words alone mean nothing.