Supposing that man has ascended from a lower animal form, there appears to be ground at least for surmising that vice, instead of being a diabolical inspiration or a mysterious element of human nature, is the remnant of the lower animal not yet eliminated; while virtue is the effort, individual and collective, by which that remnant is being gradually worked off. The acknowledged connection of virtue with the ascendency of the social over the selfish desires and tendencies seems to correspond with this view; the nature of the lower animals being, so far as we can see, almost entirely selfish, and admitting no regard even for the present interests of their kind, much less for its interests in the future.