How tribes are/were dealing with waste? (Feces, food remains or spoiled, etc)
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They compost it. Either they put it in a compost heap and will proper aeration it will turn to rich soil in just a couple of months which can be spread out on the gardens and crops. Or they burry it in pits where the same process happens much faster. Even the bones will be gone in just a couple of years in good soil. Modern agricultural soil however does not work in this way. Instead of using bacteria, fungi, amoeba, nematodes, worms, insects, etc. to provide plants with nutrition we now tend to add artificial fertilisers to the crops and even use insecticides to kill off any smaller living things. So the dirt is mostly dead and will not compost anything. This also means that any infectious diseases which might come from feces or spoiled food can survive in the dirt we have today while in could not compete with the other bacteria in the soils in the past and just get eaten by the nematodes and amoeba. So it is not safe to compost for crops today while it was in the past.
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