Oh, it's definitely not the only reason. I think looking at all these colorful responses you've gotten proves that much. But it's a practical one, don't you think?
People [Rei deliberately avoids using the word "human"] are social animals at their core. A lot of societal taboos and morals are built off those instincts, both from our ability to feel empathy and our ability to feel fear. It's better, evolutionarily, for us to not be offing each other all the time.
Frankly, kiddo.... people're usually steeped in this sense from day one, but you kind of sound like you grew up in a blank room for twenty years and then showed up here. [fucking RUDE, REI!!!] But you've made it this far, so I think you'll figure it out eventually. Good luck.
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People [Rei deliberately avoids using the word "human"] are social animals at their core. A lot of societal taboos and morals are built off those instincts, both from our ability to feel empathy and our ability to feel fear. It's better, evolutionarily, for us to not be offing each other all the time.
Frankly, kiddo.... people're usually steeped in this sense from day one, but you kind of sound like you grew up in a blank room for twenty years and then showed up here. [fucking RUDE, REI!!!]
But you've made it this far, so I think you'll figure it out eventually. Good luck.