Sorry, but neither of you boys know of what you speak. Try reading
The Spirit of the Rainforest. In this case, the diseases that were encountered were assigned (by independent study, btw, after a false accusation by rival anthropologists was made that anthopologists introduced measles on purpose[!?]), in order of likelihood to:
- land developers/prospectors
- academic anthropologists
- missionaries
The major difference is that the missionaries came equipped with medicines, and gave of their time and energy to eradicate the disease.
As far as theological diseases, the book also addresses that, too. It also addresses those "more meaningful lives", where the life expectancy was in the high twenties.
an anonymous Amazon reviewer wrote:Anyone who thinks the Yanomamo culture is idyllic must be a male: The women live in chronic danger of gang-rapes, savage beatings by their husbands, and kidnapping. And men suffer one of the highest homicide rates in the world from the frequent raiding between villages. If you think it's a romantic way of life, why don't you try it?
It is exceedingly rare that missionaries are the first "modern" contact to any people group. The much more frequent situation is that traders and adventurers have already infected the folks that missionaries visit. Small wonder that missionaries have a medical tradition.