The Global War was in many ways the end of Korsgaardism as a political force in the world. As part of the peace settlements for the Eastern Powers (excepting Russia), the defeated nations were required to disband the Korsgaardian single-party rule they had established and allow dissenting parties and politicians to operate in their nations. Truth be told, this was not a hard sell to the former Korsgaardian dominated nations as it had become obvious that their self-deluding national chauvanism and top-down, reality divorced economic policies had led to both military and financial ruin.
Zeus Korsgaard himself lived to see both the heights of Korsgaardian grandiosity and the depths of its failure. He lived out the remaining days of his life in Russia under the protection of the aging Tsar. It is rumored that his death was due to his excessive drinking after the Global War. His own bitter yet insightful critique of Korsgaardian theory, "The Blindness of the Juggernaut," published posthumously, is seen by many as the final nail in the coffin of Korsgaardist thought. Neo-Korsgaardist fringe groups often claim the work was a forgery, but literary and political analysis upholds it as a true Korsgaard work. Even though Zeus Korsgaard in the end disowned his own creation, he did defend a number of positives that had come from the Age of Korsgaard, such as the breaking of the stranglehold of the aristocracy on power and the establishment of protections by the state for workers in industry from the exploitation of industrialists (which of course led to the detractors of labor rights organizations as labeling them as 'quasi-Korsgaardists').
Korsgaardism, both for good and ill, had been the political philosophy that shaped the history of the late 19th century.