An imaginary experiment in the organization of government and society on the premise of segregating the people by character types formed by the four humours from the ancient Greeks: Choleric given by yellow bile (aggressive, energetic), Melancholic given by black bile (morbid, introspective), Phlegmatic given by phlegm (passive, sluggish), Sanguine given by blood (optimistic, good-humoured). By following the adventures of one person within this new system the author presents us with a rich and intriguing narrative.