承久之亂
The book contends that Emperor Go-Toba lost the Jōkyū War because of his immorality, that he was basically a villain of the whole story, and that the event therefore does not necessarily challenge the authority of the emperor and his court. This viewpoint, which was convenient for both the imperial court and the newly formed Kamakura shogunate, had profound influence in later relations between the people of kuge and that of samurai.