How did the America's decision to Not Sign Treaty of Versailles Had a Positive impact ToAmerica?The reason they didn’t sign the treaty of versaille on politic side. Wilson ave wilson’s 14 pointsbut Lodge was strongly against, wilson tries to consume the senators accept it then he got stroke.Personal enmity between Wilson and Lodge played a part. Wilson might have prudently invited aprominent Republican to accompany him to Paris to help ensure its later passage. Wilson's fadinghealth eliminated the possibility of making a strong personal appeal on behalf of the treaty.Ethnic groups in the United States helped its defeat.