In "Famine, Affluence, and Morality," Peter Singer quotes the famous philosopher A. Plato.
Reason: Singer references Plato to illustrate ethical reasoning and the importance of moral actions in addressing global issues like famine. By invoking Plato, Singer sets a philosophical groundwork for discussing the moral obligations individuals have towards those suffering from extreme poverty and famine. This aligns with his broader argument about the ethical implications of one's responsibilities beyond national borders.