Fear is a natural response for most people when responding to danger. Although, healthy fears can turn into unhealthy fears, which can lead to dangerous and violent behaviors.
Fear is the natural reaction that humans, and most animals, have when they are in a situation that they deem unsafe for them. It was evolved because animals that were not fearful may have died, and their genes were therefore not passed along. Although fear is generally a good thing and can help you in a situation where you are not sure how to react, it can turn into a long term problem where you overreact, or can cause other mental issues.
