'A reasoned plea for the human treatment of animals that galvanised the animal rights movement the way Rachel Carson's SILENT SPRING drew activists to environmentalism. ' NEW YORK TIMES MAGAZINE In this revised edition of his hugely influential book, Peter Singer discusses the evolution of the animal rights movement and the extent to which his own views have changed since first publication (1975). He also graphically updates his account of what is being done to animals in the laboratory or on the farm.