What is ethics? Where do moral standards come from? Are they based on emotions, reason, or some innate sense of right and wrong? For many scientists, the key lies entirely in biology--especially in Darwinian theories of evolution and self-preservation. But if evolution is a struggle for survival, why are we still capable of altruism?

In his classic study The Expanding Circle, Peter Singer argues that altruism began as a genetically based drive to protect one's kin and community members but has developed into a consciously chosen ethic with an expanding circle of moral...

One World Now seamlessly integrates major developments of the past decade into Peter Singer's classic text on the ethics of globalization, One World. Singer, often described as the world's most influential philosopher, here addresses such essential concerns as climate change, economic globalization, foreign aid, human rights, immigration, and the responsibility to protect people from genocide and crimes against humanity, whatever country they may be in. Every issue is considered from an ethical perspective. This thoughtful and important study poses bold challenges to narrow...

How should we treat non-human animals? In this book, the author addresses this simple question with trenchant, dispassionate reasoning. Accompanied by the disturbing evidence of factory farms and laboratories, his answers triggered the birth of the animal rights movement.

From the ethicist the New Yorker calls "the most influential living philosopher," a new way of thinking about living ethically

Peter Singer's books and ideas have been disturbing our complacency ever since the appearance of Animal Liberation. Now he directs our attention to a new movement in which his own ideas have played a crucial role: effective altruism. Effective altruism is built upon the simple but profound idea that living a fully ethical life involves doing the "most good you can do." Such a life requires an unsentimental view of charitable giving: to...