[MrEdd]

An extension of the peaceful native tripe.
No place had war unless Europeans arrived.

[Cronos]

Not in this case. Europeans are just another part of Eurasia - there was trading, warefare, diseaases, culture, religion and language spred from Taiwan to Ireland and places in between

The indus valley civilization didn't have any aggressor states nearby

Their successor states in the Punjab were quite warlike -- remember that they nearly defeated Alexander.

[VanShuyten]

They had no war because they were large, organized, and surrounded by desert and mountains and disorganized nomads.

[SMARTY]

I'm not sure about that. When Europeans came to the new world and when they arrived in some of the remote islands in the Pacific... Europeans found native people who were cannibals. Some tribes attacked other tribes on a regular basis and had very developed rituals of music and dance which were associated with warfare and which initiated and celebrated ‘warriors’.

The whole myth of the peaceful, ‘noble savage’ is just that... a myth. One exception I read about was the N American Hopi people. Also-I never read about Australian native people conducting warfare.