It's actually extremely difficult to search this on google, as you tend to get links referring the war on drugs or drug-related violence or MMORPGs.
The
Ya̧nomamö are generally considered to be a fairly brutal people, though many accounts of this are disputed, and they are known for using yopo snuff.
In "Shamans of the Amazon," they talk about shamans doing battle and using ayahuasca to see where their enemies were hiding.
I've heard of psilocybe being used for hunting, which in the ancient world was not so far removed from warfare.
The story of the Apache warrior, Chevato, is a good example. Peyote is commonly associated with the warpath in general, as I understand it.
3rd page of this:
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In Alan Watts' "Out of you Mind" in the chapter, "The Human World as Self," he discusses the idea that in hunting cultures, men were expected to be able to perform every manner of task, including fighting, and that the shaman was from among such a stock of men. This is contrasted with the role of priest in agrarian cultures, which I feel is what has become of most modern shamans in the aftermath of conquest by Western peoples.
I'm well aware of how brutal Western peoples were and can be (and often are). But to deny the violence and savagery and brutality of ancient and tribal cultures--especially those who have made use of entheogens--is a tendency of new age thought that I feel blinds us to the realities of our world. It also further separates us from our ancestral origins and in that way is on par with organized religion. I happen to hold the more "savage" cultures in much higher esteem than the more "civilized" cultures, if for nothing more than their honesty in their particular brand of brutality.
Also, as I understand it, entheogens such as coca and psilocybe were often reserved for the more elite classes in ancient cultures like the Aztecs and Mayans.
Violent practices are certainly not sourced in the use of entheogens, but they can possibly facilitate spiritual and emotional reconciliation with such practices. My point is that perhaps entheogenic context has less to do with ethics than with sincerity and perhaps exuberance.
As far as enlightenment goes, I would have to imagine that many Southern Asian cultures have implemented entheogens in this way.