Peter Singer is an Australian philosopher known for his work in ethics and animal rights. He is a professor at Princeton University and has authored several influential books, including Animal Liberation, which argues against speciesism and advocates for the ethical treatment of animals. His utilitarian approach emphasizes the importance of reducing suffering and promoting well-being. Singer is also recognized for his views on global poverty and effective altruism. He encourages individuals to donate a portion of their income to help those in need, emphasizing that small contributions can make a significant difference in the lives of others. His ideas have sparked widespread discussion and debate in ethical philosophy.