The definitive case for radically rethinking humanity's relationship with other animals - for the good of us all. In 1975, Animal Liberation started a global movement when it uncovered the abuse of animals in factory farms and laboratories and showed these horrific practices to be morally indefensible. In the decades since, science has vindicated Peter Singer’s arguments about animal sentience, plant-based diets have become mainstream and his landmark book has changed millions of minds. And yet, for animals, the situation has grown worse. Fully rewritten for the twenty-first century, Animal Liberation Now reveals these new developments and refines its arguments to address the pressing problems of today, including the impact of meat consumption on the climate emergency and the spread of lethal new viruses. A book of galvanising power and importance, it shows that the need to radically rethink our relationship with animals is more pressing than ever.