I’m sorry if my question isn’t particularly clear, it’s sort of hard to explain what I’m thinking. Most things that are alive have at least some sense of self preservation, and I understand the very basics behind it. For humans, it comes from being prey. However, why was it there to begin with? What caused us to have such a strong will to live? What causes self preservation for any species?
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So take an organism that doesn’t have it or is self destructive. It will die and fail to reproduce. This means only genes with this behavior is passed on. The stronger the instinct the better chance of being passed on. You see how this gets you to organisms that will do anything to survive.
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