To be fair, there are numerous non-violent societies in many parts of the world, its just that they tend to live in very isolated places and only made contact with outside powers well after the era of colonialism. We could take them as a model, but they often have very strange ontologies that don't mix with our own, and really only make sense in terms of their society (and, on account of them, they also never develop things like productive technology and reliably effective medical treatments).