A brief summary of several common worldview settings that have been seen on the subject of time and space travel~~ The first one: closed causal chain or circular causal chain, the past and the future are both predestined history, history cannot be changed, go back to The pig's feet that tried to change history in the past instead created history, that is to say, the past and the future are mutually causal. 12 Monkeys, former destinations (the logic of this film is strong and self-consistent, I think), terminators are all of this kind, and interstellar travel and arrival are also the second type: going back to the past (or by communicating with people in the past time) Other ways to affect the past) can change history, and after the change, a new timeline will cover the old one. Because of the butterfly effect, many people's lives and even their existence may have been changed. Generally, only the traveler still has the memory of the original timeline. For example, Back to the Future, Butterfly Effect, Mirage, and Steins; Gate. The original parallel universe existed at the same time. For example, Avengers 4 "Eternal End" has both one and two!
The first tastes of a fatalistic, mechanistic worldview. The latter two express that life has a variety of possibilities, and history is full of chance and randomness. A small choice can lead to a very different life. Lola Run, No Name, and Fate of the Kong (well, some dirty stuff got in there) is also the truth.
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