I think one of the things to research can be improved hunting techniques. The result acn just be as simple as synchronising the hunters' spear throws, so that the animal is hunted faster. At the moment I can get 6 people hunting a bear and only 1 person's spear hits when the bear is standing still and the other 5 throw when the bear moves on, making it wasted.
That's a good thing to keep when the civilisation is young but should be able to improve with advancement and research.
That's a good thing to keep when the civilisation is young but should be able to improve with advancement and research.