Nintendo honcho Satoru Iwata doesn't just like to talk Nintendo games. He talks other stuff. Deep stuff. Stuff like reproduction and DNA and how this factors in why we compare out strengths and weaknesses. I'll let Iwata say it. It sounds better:

This is my personal theory, but all living creatures bear the task of passing down their DNA through reproduction. To reproduce, there's the necessity to show your superiority. The individuals who can do this well are the ones that were able to pass down their DNA... So I think it's natural for us to try to show that we're better than others. That's why we tend to compare our strengths with other people's weakness. This happens in any type of social organizations, such as in companies.

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