This book deals with an inescapable every-day habit of human beings—their love to speak ill of the other, whatever the other did or said, or whatever he intends to do. Detraction permeates our daily lives and we aren’t aware of this practice. There are multiple ways of speak ill of somebody, and this is what the thinker Leandro Karnal approaches through a light, clear, and even humorous narrative, that nevertheless does not compromises his intellectual rigor.