Empathy is something that is taught. If some kid does not have the ability to have empathy for others, it’s likely because they were neglected/abused during childhood, and were not taught such a thing as empathy.
Why do you think that some kids are just plain evil? I’m reading several comments stating this thing and it just baffles me, to say the least.
I mean, in this way we are basically giving data to every big company, aren’t we?