As one of the central institutions of society, schooling is subject to significant public interest and scrutiny. Fads and fashion successfully developed elsewhere are often rebadged and relaunched in education for the purpose of improvement. Such interventions are often quickly identified as intruders and frequently fade into obscurity, but what of internal interventions, the education research that becomes widely accepted and promoted? In this paper I argue that contemporary thought and analysis in Australian school leadership has submitted to the cult of the guru. Specifically, I contend that dialogue (much less debate) has settled on the work of John Hattie's meta-meta-analysis giving rise to the Cult of Hattie. This paper is not an attack on Hattie as a person, or even his work, rather an argument about the conditions which have facilitated the rise of a guru. I argue that the uncritical acceptance and proliferation of this cult is a tragedy for Australian school leadership.