"Alongside politicians and the press, writers of fiction picked up the theme of a sinister Communist threat, a theme that drew on the intelligence wars between the Soviet Union and the West. John Buchan, a Scottish novelist who had served in intelligence during World War One before becoming an MP, saw the hidden hand of a Communist plot to take over the world. In her novel The Big Four (1927), Agatha Christie, a successful British novelist, referred to ‘the world-wide unrest, the labour troubles that beset every nation, and the revolutions that break out in some’. The sense of menace played an important role in imaginative fiction. It took forward the pre-war strand of spy fiction, but added a theme of social disorder. There was also frequently a racial dimension, with a tendency to depict hostile figures as Slav and Jewish, frequently in league with sinister elements in British (or French or American) society. This theme drew on a broader hostility to Jews that was given renewed energy by the association of the Russian Revolution in hostile eyes with them. Russian émigrés spread this assessment. In turn, there was similar material in the Soviet Union about Western plots to overthrow the Revolution, a theme that long continued."