The Moral Landscape: How Science Can Determine Human Values by Sam Harris argues that science can objectively map questions of right and wrong by treating human (and animal) well-being as a measurable landscape of peaks and valleys. Harris rejects the traditional fact-value divide, insisting that moral truths exist and can be discovered through neuroscience, psychology, and empirical study of what actually promotes conscious flourishing rather than suffering.

The book is clear, forceful, and usefully confrontational toward moral relativism, yet it leans heavily on a utilitarian framework that some readers find too reductive about culture, meaning, and the difficulty of defining well-being across different lives. Overall it remains a provocative and readable challenge to the idea that science must stay silent on values.