It's the communist docturn laid down over 50 years ago to reduce our (and the rest of the industrialized world) to 3rd world statis so that one world socialist government can be instilled.
Its not just the Communists. The one-worlder complex is broader than just the Communists. But it is definitely true that Montagu, Allport and Cousins were all one worlders. And Allport and Montagu were also Fellow Travellers.