By controlling _______, early humans were able to eat a more varied, nutritious diet. larger human settlements caused more equal, egalitarian societies to be replaced with a more structured _______. archaeologists use _______ to determine the age of artifacts by measuring the radioactive decay of an artifact. humans migrated to the americas across the land bridge named _______. despite the many positive developments, the agricultural revolution led to a rise in _______, since humans were living in close contact with more people and animals. the first domesticated animal was the _______.