Adam Hominidae Homo sapiens banefulness caducity changeableness clay corruptibility deadliness death death rate death toll ephemerality ephemeralness evanescence fallen humanity fatality finitude fleetingness flesh frailty fugacity generation of man genus Homo hominid homo human equation human family human frailty human nature human race human species human weakness humanity humankind humanness impermanence impermanency instability le genre humain lethality malignance malignancy malignity man mankind momentariness mortal flesh mortalness mortals mutability perishability perniciousness race of man transience transiency transientness transitoriness virulence volatility weakness