An argument for putting sentiment aside and maximizing the practical impact of our donated dollars: "Powerful, provocative" (Nicholas Kristof,The New York Times).Peter Singer's books and ideas have been disturbing our complacency ever since the appearance ofAnimal Liberation. Now he directs our attention to a challenging new movement in which his own ideas have played a crucial role: effective altruism. Effective altruism is built upon the simple but profoundly unsettling idea that living a fully ethical life involves doing the "most good you can do."Such a life requires a rigorously unsentimental view of charitable giving: to be a worthy recipient of our support, an organization must be able to demonstrate that it will do more good with our money or our time than other options open to us. Singer introduces us to an array of remarkable people who are restructuring their lives in accordance with these ideas, and shows how,...