In order of priority, the law of relation between conduct and consequence, the principle that each individual ought to receive the good and evil resulting from his own nature, stands first; it is the primary law holding of all creatures. The law of the restraint, in gregarious animals, of interfering acts, is second in time and authority, and is simply a specification of the form which the primary law takes under conditions of gregarious life, since, in asserting restriction of the interactions of conduct and consequence, it tacitly reasserts that these interactions must be maintained in other individuals, that is, in all individuals. The third law, of the occasional sacrifice of individuals to their kind, is later and narrower in application, and a qualification of the first law. The first law is absolute for animals in general; the second is absolute for gregarious animals; but the third "is relative to the existence of enemies of such kinds that, in contending with them, the species gains more than it loses by the sacrifice of a few members; and in the absence of such enemies this qualification imposed by the third law disappears." As human life is a development of sub-human life, so human justice is a development of sub-human justice. According to pure justice, the individual should suffer the consequences of his acts, and that such is the general opinion is implied in such common expressions as: "He has no one to blame but himself"; "He has made his own bed, and now he must lie on it"; "He has got no more than he deserved"; or, "He has fairly earned his reward." The truth that, with higher organization, danger from accident becomes less, longevity is greater, and so differences count for more, showing their effects for longer periods, and justice therefore becomes greater, applies also to human beings. The rate of mortality decreases with man, and according to his civilization.