The fight-or-flight response, also known as the acute stress response, refers to a physiological reaction that occurs in the presence of something that is terrifying, either mentally or physically. The response is triggered by the release of hormones that prepare your body to either stay and deal with a threat or to run away to safety.
The term 'fight-or-flight' represents the choices that our ancient ancestors had when faced with a danger in their environment. They could either fight or flee. In either case, the physiological and psychological response to stress prepares the body to react to the danger.
There's no document provided, I'll answer to the best of my knowledge
The abolitionist John Brown attempted to garner attention and do his part to abolish slavery by murdering three individuals who supported slavery, and later tried to host an armed uprising where he would lead slaves to raid a federal army in Harper's Ferry. The attack was unsuccessful, and he was later executed. His actions were radical, and in my opinion very misguided and would only lead to more violence.
That is my take on it, though I recommend you get your own opinion because that is a very opinionated topic.
B.extinction of large animals