EMRE, YUNUS2017-10-232017-10-2320131304-7310http://hdl.handle.net/11413/1774This paper examines the ultra-imperialism theory of German politician and theorist Karl Kautsky. Karl Kautsky's ultra-imperialism conception is an essential approach which had significant influences on political history and International Relations. The article is divided into three parts. In the first part, the ultra-imperialism theory will be discussed after a brief examination of Karl Kautsky's basic assumptions and his importance in the history of social democracy. In the second part, the place of ultra-imperialism theory within the Marxist imperialism theories will be scrutinized. Third part is about the explanatory capacity of ultra-imperialism theory for post-Second World War international relations and its usefulness with regard to International Relations theories. The basic conclusion reached was that Karl Kautsky's ultra-imperialism theory has a significant analytical capacity for contemporary International Relations studies.trKarl KautskyUltra-ImperialismLeninempireimperialismultra emperyalizmimparatorlukemperyalizmArticle330198700003330198700003