Love and Fear are the two base emotions. All other emotions stem from them. The very word "emotion" comes from the Latin "to move." That is to say to cause someone to take action.
All fear and anxiety are is the human brain trying to prolong the life of itself. Your brain causes you to concentrate on past pain and the anxiety of future pain to work out a solution to avoid said future pain. Pain from the past and anxiety of the future create prison that robs you of joy, peace, and happiness. Living in the present is important because that is the only place life really exists.
Western culture is obsessed with preserving the Self. It teaches that each person is separate. We are taught as children this and we create this fictitious persona that fears coming to an end. That is why Christianity is obsessed with salvation. Salvation is nothing more than giving your ego immortality so it can rest easy at night.
Like all other living organisms, humans do not have and never had "everlasting life." We are born. We live and then we die to make room so other have a chance to live.
Fear of death isn't the real issue. It is fear of not living forever that is the issue. Once a person no longer desires to live forever religious control groups no longer have control over the individual.