But our intuition is the same thing as our atavistic tribalism, isn't it?We humans have known for centuries that we can manipulate the behavior of others using reward and punishment methods. But there is absolutely no evidence that we can use it to change their innate intuition. And that's what you are alleging without evidence.
Conscience is an intuitive moral guide only. People obviously ignore it for lots of reasons.
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Look how easily militias strip away our social conditioning and replicate the in-group altruism, and the competition and moral indifference to the other that we're already hard-wired with. We're comfortable in tribes and bands (companies and platoons).
It's easy to replicate the inner Neanderthal.