By that time, anarchism also established itself around the country while socialists of different tendencies were involved in early American labor organizations and struggles which reached a high point in the Haymarket affair in Chicago which started International Workers' Day as the main workers holiday around the world (except in the United States, which celebrates Labor Day on the first Monday of September) and making the 8-hour day a worldwide objective by workers organizations and socialist parties worldwide.
Pada saat itu anarkisme juga eksis di negara tersebut, dan sosialis dari tendensi lain terlibat dalam organisasi dan perjuangan buruh Amerika awal dan mencapai puncaknya dalam Peristiwa Haymarket di Chicago yang memicu Hari Buruh Internasional sebagai hari libur utama di seluruh dunia (kecuali di Amerika Serikat yang merayakan Hari Buruh pada Senin September) dan menjadikan 8 jam kerja sebagai tujuan bagi organisasi pekerja dan partai sosialis di seluruh dunia.