After a brief stay in the United States he moved to London and became a member of Social Democratic Federation (SDF), whence he went on to help found the Socialist Party of Great Britain in June 1904.
The following year he was a delegate at the Social Democratic Party (as the SDF had been renamed) Conference and was elected to its 1910–1911 Executive Committee.
During the later part of the First World War he was a member of the relatively large and actively anti-war North London Herald League, as documented in Ken Weller's Don't Be a Soldier.
(Other ex-SPGBers in the NLHL include R. M. Fox of Smokey Crusade fame; Les Boyne, an early member who was also in E. J.
He was appointed a CBE in 1948 and, in 1951, he was elevated to the peerage as Baron McEntee, of Walthamstow in the County of Essex,[1] in recognition of his "political and public services".