Well you don't shriek at a fun party or else people would call you weird XD, and you wouldn't growl because you're a human, not an animal, and again you wouldn't wail because you're a human, not an animal XD
Empathy, and understanding both side of the story
Yes, humans did exist in the cenzoic era but i don't think they were the first to appear in it
I want to say that biology is the answer.
you can get an illness that is triggered by stress. That's the simplest way I can explain it.
Leaders are chose by a popular vote in a democratic form of government. hope this helps, have an amazing day :)
