By understanding fear, we can overcome our phobias. Fear has a complex relationship with other emotions and can even be irrational. The number one fear in the United States is public speaking, but almost all people are afraid of the unknown. In response to fear. Our brain gives one of two responses: fight or flight. Even fear does not exclusively mean fear; it can be a fearful respect. Most human beings experience fear at some point. However, there are rare exceptions. By attempting to understand fear and its many variations, we are able to understand better