The death of the flesh itself is the original death that passed on to us all from Adam. HEBREWS ;9; 27; And as it is appointed unto men once to die, but after this the judgment. The old world before the flood had not the law,that is why they were so corrupt., but could not be punished for their sins at that time. there was no law broken,because there was no law given ..that is why death reigned from Adam to Moses. once the law was written, all was held accountable for their sins.God's grace to save mankind was in the making from Moses to Jesus. He preached to the living and the spirits in hell,sparing no one from the Gospel,then the old world was held accountable.