I had a friend in the states that was a volunteer in South America, possibly Bolivia, but I don't exactly recall. He spoke fluent Spanish as a result, understood the mentality down there, and until the end of his life obviously had a strong connection to that part of the world. He mentioned chewing coca leaves during his time there, and I can't say that their byproduct wasn't a contributory factor in his death, or at least it was a part of his not taking care of himself like he should have. An individual of mixed character, and everyone loved him beyond what else. Oddly enough, when there was a time when he felt that he had to try and get his life on a better track, back down to South America is where he went. A unique person in some respects, a good craftsman, his Peace Corp experience was a major influence in his life after. He did have his indulgences, originally left quite alone with no family at a young age, having also lost his two brothers in WW2. A person I think about quite regularly, as do others I know.