The primary function of fear is to warn us of potential danger. Without fear, humanity would not survive. If a wild animal attacked you, fear would a… - Darius Foroux

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The primary function of fear is to warn us of potential danger. Without fear, humanity would not survive. If a wild animal attacked you, fear would alert you, which triggers a fight or flee response. Fear’s fundamental function is to protect you from harm. Nowadays, we do not face so many looming threats as before modern civilization, but the fear mechanism is still a part of our system. Evolutionary speaking, fear comes from our reptilian brain. Although while we do not need fear in the same way anymore, evolution has not adapted our brain yet. It will probably take thousands of years before our fear mechanism adjusts to modern-day life. But the truth is that we no longer need fear to survive.