 He expressed dislike for other strategies like rebellion, secession, or the various Back to Africa movements — which Harris described as "Negro Zionism" — led by such figures as Marcus Garvey and Haile Selassie I.In "The Black Worker", Spero and Harris asserted that African Americans could put an end to the racial antagonism in the working class.They wrote about the history of the racial predicament between whites and blacks had stemmed from the days of slavery.