Mary Midgley (1919–2018) stands as one of the most influential and wide-ranging moral philosophers of the twentieth century. For more than four decades, she championed the relevance of philosophy to everyday life, while making profound contributions to debates on human nature, ethics, animals and the environment, science, religion, and other pressing real-world issues. Her extraordinary career produced over 250 works - books, articles, pamphlets, and more - culminating in What Is Philosophy For? , published at the age of 99, just one month before her death. This final work completed a remarkable late-career series that secured her reputation as a distinctive voice and a powerful example of women's enduring presence in philosophy. Mary Midgley on What Matters offers an intimate glimpse into this vibrant period of Midgley's life. Drawing on a series of visits and conversations between Gregory McElwain and Midgley at her Newcastle home from 2011 to 2018, the book presents her reflections, anecdotes, and concerns on the themes for which she is best known - with particular attention to her influential views on animals and the environment. Framed and curated by McElwain, these dialogues capture Midgley's wit, warmth, and intellectual vitality, giving readers the rare experience of engaging with one of the most spirited philosophers of recent memory. “This unique book provides a personal perspective into the original, wide-ranging, and underappreciated work of Mary Midgley. McElwain's interviews and personal reflections flesh out Midgley's insights about topics ranging from the metaphysical to the concrete. They also shed light on the biographical and historical context in which she worked, especially her role in the influential “quartet” along with G.E.M. Anscombe, Philippa Foot, and Iris Murdoch.” ― Anna Peterson, Cronin Term Professor of Religion, University of Florida, USA Gregory S. McElwain is Associate Professor and Chair of Philosophy and Religious Studies at The College of Idaho, USA.