Hi there!
The environment and society help study history in so many ways. If you look deeper you can actually see how the environment affected history. As the environment changes, time advances and sometimes you can link why something’s happened due to environmental changes. An example would be an area off the coast of Spain considered the “Lost City Of Atlantis”. Scientists used their knowledge of how society lived their life back then and linked to how the people may have built their city in the most functional way possible.
Hope this helps !