sentences:  But Filipchenko was staunchly against Bolshevik ideas regarding the sterilization of undesirables and mass insemination of women by men with exceptional genetics, stating that such acts were "crude assaults on the human person" and that the best way to create a "desirable breed" was through positive selection.In Filipchenko's eyes, eugenic progress could only be achieved through education rather than legislative or scientific methods.However, by 1925, the appeal of Soviet eugenics had waned due to issues outside of just the negative aspects of the subject.