This podcast episode explores the ethical implications of speciesism and the treatment of non-human animals. Sam Harris welcomes Peter Singer, a philosopher and advocate for animal rights, who discusses his influential book, "Animal Liberation," and its impact on philosophy and public policy. They delve into the concept of speciesism and argue against the moral hierarchy based on species, emphasizing the importance of considering the capacity for suffering in determining moral worth. The speakers also discuss the ethical quandary surrounding animal agriculture and the consumption of animal products. They highlight the immense suffering endured by animals and the complexities of balancing animal welfare with human consumption. The podcast further examines the ethical concerns of animal experimentation, particularly in psychological science, and advocates for the need to find non-animal alternatives. Overall, this episode challenges traditional views on human superiority and calls for a more compassionate and ethically conscious approach towards non-human animals.