How did the invention of the fire changed the world?
Answers
Everything is what Fire changed for primates that are now humans, and even more when we look at prehuman primates. But it can be simplified into two categories; tool and diet. But to develop the use of Fire, the human had to gain cognitive processing skills.
My hypothesis is unpopular with current opinion. There are Five Elements; Earth, Air, Water, Aether, and Fire. Before cognitive processing was possible, Air, Water, and Earth were required to attain tool status to support Genus Homo life. Fire became a weapon that allowed humans to protect themselves. No other life form on Earth uses Fire. It is the ultimate weapon used by humankind to this day. Fire became the first technology and later a manufacturing skill.
Once spatial and mechanical cognition was sufficiently developed, Fire became a tool to improve dietary protein and manipulate the environment. Fire became the key to human survival and remains the technology for human survival to this day.
Fire made the Second Technology, Electron Technology, which is less than 150 years old possible to change the human into an artificial animal living in an artificial environment of human manufacture. Fire became the tool which gave humans dominion over Earth, Air, Water, and Fire. Fire is the Primary Element used by humans to control the remaining Element, Aether. Fire has enabled the human to become the most predatory and invasive life form on Earth.
Hope it helped you