📖 A superb treatise in evolution and eugenics from one of Britain's leading professors of physiology and discoverer of the anti-coagulant hirudin. Professor Haycraft discusses race, Darwin's Law of Selection, Galton's work, and the hereditary nature of diseases, insanity, alcoholism, crime and racial degeneration.He moves on to detail healthy eugenics, the outbreeding of the "capables" by the "incapables" and the necessity for the best in society to expand their numbers at the expense of the worst.A medical doctor by training, Professor Haycraft was also a research scholar of the British Medical Association and was chair of physiology at University College, Cardiff where he worked until retirement in 1920.