John Taylor Caldwell (14 July 1911 – 12 January 2007) was a Glasgow-born anarchist communist and close associate and biographer of Guy Aldred.
Caldwell joined Aldred's United Socialist Movement (USM) shortly after its inception in 1934, eventually becoming secretary.
He was closely involved in the group's agitational work in support of anarchism in Spain before becoming – along with Jenny Patrick and Ethel MacDonald – a full-time "family" member of Aldred's Strickland Press when it was set up in 1939.
[1] Following Guy Aldred's death in 1963, Caldwell continued the work of both the USM and Strickland Press before finally closing the doors of their radical bookshop (somewhat coincidentally) in May 1968.
[3] The latter was subsequently published, in an abridged form, as Come Dungeons Dark: The Life and Times of Guy Aldred, Glasgow Anarchist.