Death is the cessation of all biological functions that sustain a living organism. Phenomena which commonly bring about death include biological aging (senescence), predation, malnutrition, disease, suicide, homicide and accidents or trauma resulting in terminal injury. Bodies of living organisms begin to decompose shortly after death.
In society, the nature of death and humanity’s awareness of its own mortality has for millennia been a concern of the world’s religious traditions and of philosophical inquiry. This includes belief in resurrection (associated with Abrahamic religions), reincarnation or rebirth (associated with Dharmic religions), or that consciousness permanently ceases to exist, known as eternal oblivion (often associated with atheism).