 That May he inaugurated with nine others the short-lived "Agudat haSozialistim haIvrit" (Hebrew Socialist Union), the first Jewish workers' organization.Liebermann was appointed Secretary and drew up the statutes of the Union, which he composed in classical Hebrew and Yiddish.After clashes between the members of the Union and the police, Liebermann left London in December 1876, settling eventually in Vienna under the false name of Arthur Freeman.