History of the socialist movement in the United States

Socialism in the United States began with utopian communities in the early 19th century such as the Shakers, the activist visionary Josiah Warren and intentional communities inspired on Charles Fourier. Labor activists—usually British, German, or Jewish immigrants—in 1876 founded the Socialist Labor Party. The Socialist Party of America was established in 1901. 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 who celebrate Labour Day on the first Monday of September) and making the 8-hour day a worldwide objective by workers organizations and socialist parties worldwide.