You can use fossils to study the old days or older versions of objects
They were very effective if you need reasons comment and I’ll give some
Answer:
Social Darwinism cultivated the mindset that Europeans were biologically superior to any other culture or civilization. As a result, they believed it was their right as a "superior" group of peoples to take over "inferior" countries and "civilize them" (enforced european practices or economically exploited them). Their mindset: if they were a superior group of people, they were allowed to take over in order to ensure they do what is best for human evolution as a whole.
I think it's Rotation Farming but I'm not 100% sure
I think the Chinese where the ones who invented it in the 9th century! They then started using it as fireworks.
