All important questions in life will of course be addressed by TOS Star Trek. In this case the The Enemy Within.
Dan Carlin did a fantastic series Wrath of the Khans an referred to Genghis as an 'historical arsonist' and likened his behavior to a forest fire. In the long run it's good for you - really - but when you ass is on fire it may not seem so right at that moment. All the violence, competition, war, greed, kindness, altruism, logic, intellect - all of it - make up the soup. It's what makes us what we are and allowed us to thrive. So yeah, essentially the people who put cool golden records on probes are the same ones who stuff one another into ovens from time to time. Can't separate the wheat from the chaff so easily, but if you have a transporter you apparently can divvie up Capt. Kirk pretty easily.