It is usually dated through the eschatological discourse in Mark 13, which scholars interpret as pointing to the First Jewish–Roman War (66–74 AD)—a war that led to the destruction of the Second Temple in AD 70. This would place the composition of Mark either immediately after the destruction or during the years immediately prior.

dating of

Annihilationism (Wikipedia) In Christianity, annihilationism (also known as extinctionism or destructionism) is the belief that after the Last Judgment, all damned humans and fallen angels including Satan will be totally destroyed, cremated, and their consciousness extinguished rather than suffering forever in Hell. Annihilationism stands in contrast to both the belief in eternal torment and to the universalist belief that everyone will be saved. However, it is also possible to hold to a partial annihilationism, believing unsaved humans to be obliterated or cremated, but demonic beings to suffer forever.

Gospel of Mark (Wikipedia) The Gospel of Mark is the second of the four canonical Gospels and one of the three synoptic Gospels. It narrates the ministry of Jesus from his baptism by John the Baptist to his death, the burial of his body, and the discovery of his empty tomb. It portrays Jesus as a teacher, an exorcist, a healer, and a miracle worker. Jesus refers to himself as the Son of Man and is called the Son of God, though he keeps his messianic nature secret; even his disciples fail to understand him. This is in keeping with the Christian interpretation of prophecy, which is believed to foretell the fate of the messiah as a suffering servant.