Is the capability to murder genetic?

My mother has close family members who have done time in prison for murder. My father has family members in prison right now for murder as well. My grandparents were criminals, they were gang members to be precise, but were never caught during their errants. I do feel like I’m capable of killing without remorse. Is... show more My mother has close family members who have done time in prison for murder. My father has family members in prison right now for murder as well. My grandparents were criminals, they were gang members to be precise, but were never caught during their errants.
I do feel like I’m capable of killing without remorse. Is this genetic or just part of being human? What was “murder” called before it was invented by the law? When did “murder” started being against the law?
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