any alien civilization with ftl travel is going to taker possession of the planet earth in a lot smarter and low key fashion than in independence day. there was an old science fiction story which told of male humans ever increasing hatred of female humans, which grew to such an extent where the males genocided the females, and at the end one of the last females on earth is hiding in a cave, and sees a flying saucer float by. the hatred was caused by the aliens. they would just have to wait a few decades for the remaining humans to die out.
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