Your comment ties into the idea that some large percent (1-5%) of the population are sociopaths. (Link has some sources https://www.quora.com/What-percentage-of

Your comment ties into the idea that some large percent (1-5%) of the population are sociopaths. (Link has some sources https://www.quora.com/What-percentage-of-people-are-psychopaths-sociopaths https://www.quora.com/What-percentage-of-people-are-psychopa...) Quite simply many people behave without remorse of empathy and those traits are useful for gaining and taking power and using it against other.