Williams was the inspiration for and one of the founding members of the Humanitarian League, in 1891, which "opposed all avoidable suffering on any sentient being".[4][6] He remained on the board for several years and authored the "Pioneers of humanity" section for the league's journal, which was later published as a popular pamphlet.[1] He also served as the Vice-President of the London Vegetarian Society[5] and was a board member of the Animal Defence and Anti-Vivisection Society.[4]
^Gregory, James. (2007). Of Victorians and Vegetarians: The Vegetarian Movement in Nineteenth-Century Britain. Tauris Academic Studies. p. 109. ISBN978-1-84511-379-7