 Taylor argued that the mobilization that was meant to serve as a threat and deterrent to war instead relentlessly caused a world war by forcing invasion.Other authors, such as the American Marxist historian Arno J. Mayer in 1967, agreed with some aspects of the "Berlin War Party" theory but felt that what Fischer said applied to all European states.In a 1967 essay "The Primacy of Domestic Politics", Mayer made a "Primat der Innenpolitik" ("primacy of domestic politics") argument for the war's origins.