Known to his contemporaries as Sam, Mainwaring was born 15 December 1841 in Penrhiwtyn, Neath, Wales. He was a native speaker of Welsh and retained an affinity for the tongue throughout his life. Mainwaring was raised by his family as a Unitarian. He developed into a quiet yet persuasive public speaker and a tireless worker for activities which he believed important. Mainwaring was a member of the Amalgamated Engineering Union.
Political career
Late in the 1870s, Mainwaring joined the East LondonLabour Emancipation League and was an early member of the Social Democratic Federation. However, this group proved to be a disappointment, failing to garner support of an appreciable section of the working class and was believed by many members to overly dominated by the intellectual pretensions and nationalistpolitical views of its patriarch and patron, Henry Hyndman. In 1885, there came a split in which Mainwaring joined with Eleanor Marx, Ernest Belfort Bax and his friend William Morris in forming the Socialist League. Mainwaring was a foreman of a shop which employed Tom Mann and exerted a political influence upon him. Over time, Mainwaring's views gradually evolved from revolutionary socialism to those of anarcho-communism. In 1891, Mainwaring moved to Swansea and there started the Swansea Socialist Society. He became associated with the fledgling anarchist newspaperLiberty, edited by J. Tochatti, formerly of the Hammersmith branch of the Socialist League. In September 1903 and March 1904, Mainwaring published two issues of a short-lived newspaper called The General Strike, a publication which made detailed criticisms of the "officialism" of union bureaucracy and which publicised strikes in Europe making use of syndicalist tactics.
Death and legacy
In his later years, Mainwaring lived in London. On Sunday, 29 September 1907, while addressing a meeting on Parliament Hill Fields, Mainwaring was stricken by faintness and subsequently died. He was 55 years old at the time of his death. Mainwaring is credited with coining the phrase "anarcho-syndicalism" and it is for this he is best remembered. Mainwaring was cited as a major intellectual inspiration by the radical British labour leader Tom Mann. In his 1923 memoirs, Mann credited Mainwaring with having been "one of the very first to understand the significance of the revolutionary movement, and the first, as far as my knowledge goes, to appreciate industrial action as distinct from parliamentary action". Mainwaring was the namesake of a nephew whom he adopted, Sam Mainwaring Jr., himself an important radical activist in the internationallabour movement.
