Madness and civilization

Yesterday I just uploaded my mid-term report of history, I read a book called Madness and Civilization. When I was in senior high, I have heard my history teacher tell about the book.
Madness and civilization is a book which is written by Michel Foucault. Although he studied philosophy as well as psychologist, many of Foucault's concerns might be described as "structuralist". Madness and Civilization was presented as his doctoral thesis in 1960, and was published in 1961. It is a deep and complex treatment of the role of madness in Western society. It begins by describing end of leprosy in Europe and the emergence of madness as a replacement for leprosy at the end of the Middle Ages. The book was devided to 9 chapters, the main ideas including aspects of mental, medical, economy, even society.
In my opinion, madness has something relationship with civilization. After I read the classical book, I think in society full of madness, reasonstill exist; in rational society, there is still madness. They appear simultaneously.