Bringing together new essays by philosophers and activists, "In Defense of Animals: The Second Wave" highlights the new challenges facing the animal rights movement. This book contains an exciting new collection edited by controversial philosopher Peter Singer, who made animal rights into an international concern when he first published "In Defence of Animals and Animal Liberation" over thirty years ago. The essays explore new ways of measuring animal suffering, reassess the question of personhood, and draw highlight tales of effective advocacy. It lays out 'Ten Tips for Activists', taking the reader beyond ethical theory and into the day-to-day campaigns for animal rights.