Why was the civil war considered the first modern war?

Historians consider The American Civil War to be the first modern war. They regard it to be the first modern war because it was the first war where widespread use of mechanized and electrified devices like railroad trains, aerial observation, telegraph, photography, torpedoes, mines, ironclad ships and rifles occurred.

deists, human beings can know god only via reason and the observation of nature, but not by revelation or by supernatural manifestations

hope this

food chain i would say only because there is competition on getting food and survival