Bachofen finds the proofs of these propositions in numerous quotations from ancient classics, collected with unusual diligence. The transition from "hetaerism" to monogamy and from maternal to paternal law is accomplished according to him--especially by the Greeks--through the evolution of religious ideas. New gods, the representatives of the new ideas, are added to the traditional group of gods, the representatives of old ideas; the latter are forced to the background more and more by the former. According to Bachofen, therefore, it is not the development of the actual conditions of life that has effected the historical changes in the relative social positions of man and wife, but the religious reflection of these conditions in the minds of men. Hence Bachofen represents the Oresteia of Aeschylos as the dramatic description of the fight between the vanishing maternal and the paternal law, rising and victorious during the time of the heroes. Klytaemnestra has killed her husband Agamemnon on his return from the Trojan war for the sake of her lover Aegisthos; but Orestes, her son by Agamemnon, avenges the death of his father by killing his mother. Therefore he is persecuted by the Erinyes, the demonic protectors of maternal law, according to which the murder of a mother is the most horrible, inexpiable crime. But Apollo, who has instigated Orestes to this act by his oracle, and Athene, who is invoked as arbitrator--the two deities representing the new paternal order of things--protect him. Athene gives a hearing to both parties. The whole question is summarized in the ensuing debate between Orestes and the Erinyes. Orestes claims that Klytemnaestra has committed a twofold crime: by killing her husband she has killed his father. Why do the Erinyes persecute him and not her who is far more guilty? The reply is striking: "She was not related by blood to the man whom she slew." The murder of a man not consanguineous, even though he be the husband of the murderess, is expiable, does not concern the Erinyes; it is only their duty to prosecute the murder of consanguineous relatives. According to maternal law, therefore, the murder of a mother is the most heinous and inexpiable crime. Now Apollo speaks in defense of Orestes. Athene then calls on the areopagites--the jurors of Athens--to vote; the votes are even for acquittal and for condemnation. Thereupon Athene as president of the jury casts her vote in favor of Orestes and acquits him. Paternal law has gained a victory over maternal law, the deities of the "younger generation," as the Erinyes call them, vanquish the latter. These are finally persuaded to accept a new office under the new order of things.