In this book, the Author tries to address the relationship between power and rationality. Through an in-depth analysis of the history,of society,the author shows a curious relationship between the two concepts. The author argues that rationality is implicitly used as a tool to serve the will of power. This book mainly focuses on the philosophy of Michel Foucault. This book can be useful for those interested in engaging in fields such as postmodern philosophy, and Critical social Theory.