Do we Inatley know how to Kill?

In The Murderer Next Door Buss explains that he is a believer in evolutionary psychology, and thinks a lot of our traits we have are there because we acquired them from our ancestors through evolution. According to psychology our most basic goals in life are to survive which ultimately will let us reproduce to pass on our traits. So, overtime as those traits that help people kill get passed on (whether it be more physically able than the average person or smarter, etc), So, according to Buss, we are born naturally to kill, just because in the past killing was sometimes how you secured a spot with a mate to reproduce offspring.

But things are different now, we have more rules. You go to jail if you commit homicide, and everybody looks down upon you. So you face ostracism because murder isn't something 'normal' people do, we have to be a bit more clever than just killing anyone who is vying for the same mate.

As stated before, there are many barriers that deter people from killing-possible guilt afterward, ostracism, or jail. Of course sometimes we perceive to have no choice but to kill to solve a problem. I think most of the time we think that killers are crazy people where something was screwed up in their head, yet most of the people who commit homicide are deemed to have no mental instabilities and had premeditated the murder. It's because sometimes I think-although it's hard for us to think of-that they see no other plausible way out. Consider a man who thinks his wife is cheating on him. Then he eventually finds out it was true, she was sleeping with other men. She promises to change, that she was weak but she truly loves him with all her heart, yet the man doesn't quite believe her. He gives her the chance but something, to him, still doesn't feel right. He doesn't trust her, and unfortunately finds out again that she was cheating on him, and now feels there is no other way to take except murder. So, the man, angry that his mate isn't bearing his offspring, feels that since she isn't trustworthy must take action. Although to us, it may not seem normal or logical to us, sometimes that how it plays out.

Exterminating any competition also has a multiplied effect than just being dead-similar to the Keynesian models in economics. That is, it is obviously bad to be dead, we all know that. But if we are dead (or unfortunately murdered), not only are we dead but we are unable to protect any children we've already had, and we can no longer produce any more, and our widowed spouse also can hook up with another mate. Thus, all our genes that would've been passed on are either exterminated on the spot, or-if we had had children already-are severely weakened because they no longer have a parent to protect them. So, it might be a good idea to not get killed.