>Not sure where else to ask this so here goes
When choosing to race a dog you go with the breed(s) known to be fastest and you avoid choosing a breed which is big and slow. That seems very logical to me. Wouldn't it then be reasonable to say that some breeds are more inclined to be aggressive than other breeds just as some breeds are more inclined to be docile?
Can't you then extend that beyond dogs and say that certain species of spiders jump further than others. Some big cats are more anxious than others like cheetahs. Would it not be logical to extend that to people as well? I'm sure there are many factors here but isn't it possible for some races to have even a slight bias towards aggressiveness or submissiveness?

I'm genuinely asking, not trolling with race bait. What am I getting wrong?