Barb, correct me if I'm wrong, but I do believe you need at least a level 2 spirituality? I think my villagers were burying at that level...
After you have the correct tech levels you have to encourage them on their first burial. See they're kind of lazy and prudish and getting dirty while digging or making tombstones is not their favorite thing. So once you have enough Spirituality you need to take a villager to a place that looks nice for burying and see if they notice anything. Once they see what they're looking for they'll bury all on their own!
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Rebecca
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