Back in San Francisco, Kingsley bided time working as a librarian after his expulsion from Socialist Labor Party of America in California. He had run for Congress in 1896 and 1898, but had been ejected from the party during a faction fight in 1900. Kingsley then moved on to Washington State, where he founded the very short-lived Revolutionary League of Seattle in 1901. However, Kingsley's reputation was well known north of the border, and he came to Nanaimo in February of 1902 on invitation for a two-month speaking and educational tour. Kingsley's expertise in the intellectual framework of Socialist thought, honed in San Francisco, made him a valuable asset as an educator, organizer and communicator to the emerging radical socialist movement in British Columbia. This was all the more remarkable as Canadian immigration law at the time largely prohibited immigration of people with disabilities.
Kingsley's politics had hardly changed in the intervening years, and he remained as dedicated as ever to a political solution to the Socialist question. The invitation to Canada came at time when Socialist thinkers of all different factions began to explore the possibilities of becoming a conscious, political force vying for control of the state, rather than focusing more narrowly on the advancement of the living conditions of the working class. Kingsley's arrival also coincided with growing moves toward political unity in British Columbia, as the recent immigrant helped shepherd the re-unificaton in 1903 of the Revolutionary Socialist Party with the Socialist Party of British Columbia from which it had splintered. Working in part with socialist newspaperman Richard P. Pettipiece, Kingsley also took editorial control of the Western Clarion newspaper, turning it into a powerful voice for the advancement of political Socialism.
While Kinglsey controlled the intellectual message of the SPC, the party was led more publicly by popular elected figures such as James H. Hawthornthwaite, and other avowedly Socialist politicians who enjoyed popular support on Vancouver island and deep in the mining communities of the Kootenay mountains in the province's interior. These areas saw Kingsley visiting as an organizer and speechmaker, building support for the SPC's cause.
However, in 1907, conflict soon emerged again between the impossiblist and gradualist camps, when suspended SPC party member Ernie Burns seceded and formed the Social Democratic Party of BC, identifying the dogmatism of Eugene Kingsley as the immediate cause. The old wounds that had been covered over when Kingsley brokered peace between the two camps in 1903 ripped open anew, and the Left in British Columbia became as fractured as before.
Despite the turmoil, Kingsley tirelessly continued to tour into 1908, travelled to Winnipeg, and then on to Toronto, speechmaking, campaigning and organizing. Remembered as "The Old Man" and "The Old War Horse" by legendary BC Socialist Bill Pritchard, Kingsley was a tireless, and experienced campaigner, but one whose rigid inflexibility of ideology could be as much of an asset as it could be a liability.