In his 2005 book "The Russian Roots of Nazism: White Émigrés and The Making of National Socialism", the American historian Michael Kellogg argued that there were two extremes of thinking about the origins of National Socialism, with Nolte arguing for a "causal nexus" between communism in Russia and Nazism in Germany, but the other extreme was represented by the American historian Daniel Goldhagen, whose theories ate a unique German culture of "eliminationist" anti-Semitism. Kellogg argued that his book represented an attempt at adopting a middle position between Nolte's and Goldhagen's positions but that he leaned closer to Nolte's by contending that anti-Bolshevik and anti-Semitic Russian émigrés played an underappreciated key role in the 1920s in the development of Nazi ideology, their influence on Nazi thinking about Judeo-Bolshevism being especially notable.