Empathy is dependent-on mirror-neuron-system: without that working, you're a psychopath, from what I can see.
The more mirror-neuron-function, the greater the pressure to be in empathy.
Claiming that it's a learned-skill to me seems backwards:
sociopathy's a learned-skill, culturally.
Empathy's the natural-default.
Show me a chimp-mom not having empathy for her baby/toddler..
It's non-empathy which has to be enforced, at the whole-population scale, to change/imprint/configure that population.
The people who after being in the Soviet Union said things like "we weren't sociopathic, before", back this.
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