While in 1970 McLuhan spoke of World War III as a "guerrilla information war," in the same year Ryan wrote for Radical Software, a journal of the Raindance foundation, the article Cybernetic guerrilla warfare.
McLuhan and Ryan both discussed the concept of "cybernetic guerrilla warfare" in 1970. McLuhan's idea was about World War III as a "guerrilla information war," while Ryan's article explored this theme within the context of technology and its impact on warfare.