 In his article "A Demilitarized League of Nations", ("Hibbert Journal", August 1936) Jacks argued the League of Nations should completely eschew military force.Although he continued to preach Unitarianism, he became increasingly critical of all forms of institutional religion and denominationalism, and refused to let his name be added to a list of Unitarian ministers published by the General Assembly of Unitarian and Free Christian Churches in 1928.He accepted an invitation to preach in Liverpool Cathedral in 1933; a Convocation of the Church of England rebuked the cathedral for allowing a Unitarian to preach, igniting a controversy in the press.