This volume is the first to present a framework of general principles for animal research ethics together with an analysis of the principles' meaning and moral requirements. This new framework of six moral principles constitutes a more suitable set of moral guidelines than any currently available, including the influential framework presented in the emPrinciples of Humane Experimental Techniqueem published in 1959 by zoologist and psychologist William M. S. Russell and microbiologist Rex L. Burch. While other accounts have presented specific directives to guide the use of animals in research, Tom L. Beauchamp and David DeGrazia here offer a set of general moral principles that are adequate to the task of evaluating biomedical and behavioral research involving animals today. Their comprehensive framework addresses ethical requirements pertaining to societal benefit-a critical consideration in justifying the harming of animals in research-and features a thorough program of animalbrwelfar