Are there any peaceful tribes or civilizations that ever lived in harmony with nature and never fought wars?

When I was in school my teacher told me that Native Americans and Native Australians were peaceful and lived in harmony with the Earth until the Europeans arrived there, is this true or false? I've heard that Christian Europeans view nature as disposable and should be subdued yet indigenous tribes view the whole Universe as sacred, the earth is considered their mother and the sky their father.


Is this true or not?