People fear the
unknown,
death is unknown. Is it eternal silence or is there an
after life? is one question
universaly asked.
Heaven and
hell also comes to mind, the majority of people afraid of dieing are afraid of hell's tortures. People who lead good lives do not fear death and actually welcome it when it arrives. Many philosophers talked about death in their philosophies, and many philosophers do not fear it.
Aristotle,
Plato and the
Persian philosopher
Miskawayh all talked about death in their works. Similarities between Philosophical works are close, it all concludes that people fear the unknown.
There are other people who do not fear death. Depressed people with the belief that death will end their
misery.
Japanese
Sippuku ritual with the belief of getting rid of
shame and
disgrace, fear of shame out weight fear of death.
Muslim Mujahidin with the belief of an instant to heaven access if they ever die
martyrs.