The science of animal production has recently become headline news. The cloning of sheep, the use of pig xenotransplants and bovine somatotrophin, as well as mad cow disease, are all examples of how livestock production is related to food safety, human health, ethics and quality of life. The relationship between intensive developed-world animal production and that of the developing world also raises ethical issues. These are just some of the topics addressed in this book, which originated in a special symposium held at the VIII World Congress on Animal Production held in June 1998 in South Korea. Additional chapters have been commissioned for the book to improve its comprehensiveness.