Peter Singer has revolutionized the way we think about morals and values. He’s lead the way in providing evidence for some of the toughest moral controversies such as animal rights, abortion, and wealth inequality. Singer’s newest book is entitled The Most Good You Can Do, and it's an exploration of the philosophical movement known as effective altruism; the desire to make the world its best possible version using reason and evidence.

This week on Point of Inquiry, Singer discusses how opinion and fact are not mutually exclusive, and how effective altruism uses science-based evidence and critical thinking to uncover moral facts and open a dialogue about what values are objectively going to benefit us the most.