Not sure if this is Germaine to the discussion, but as far as I know the indigenous people of Central and South America were not working steel before the Spanish arrived. Accordingly they got machetes that he Spanish or their descendants made, not something they had developed to suit their needs, at least initially. In South East Asia, the Philippines. Indonesia, Borneo they were working steel as the Spanish and later us (USA) discovered when we took over the Philippines after the Spanish American War, and those indigenous peoples developed goloks and parangs and a host of other cutting tools that suited their purposes. I like watching "Elang Bushcraft" on You Tube, where the man is in a Tropical Rain Forest on one of the Islands in Indonesia (they have over 17,000 islands!) and he caries two Parangs, one with about a 14-16 inch blade, the other about 9 inches which he uses primarily for food preparation. I enjoy watching him as he does not use anything other than those two Parangs (not sure if that is the proper term for them) to make shelters in the Jungle, dig holes, prepare food, split up logs for fire wood, and chop thru tree trunks. No tarps, saws, nails , makes shelters, splits long leaf type plants to make roofs on the shelters, and cuts up vines. and long roots he uses to tie of frame works of his shelters. Would a machete work as well in "His Environment"? Not sure but those Parangs work well for him. John