 Once a Trotskyist Marxist, O'Neill was formerly a member of the Revolutionary Communist Party and wrote for the party's journal, "Living Marxism".O'Neill self identifies as a Marxist libertarian and writes for a range of publications.He began his career at "Spiked"'s predecessor, "Living Marxism", the journal of the Revolutionary Communist Party, which ceased publication after ITN won their libel action against it.