Ethical subjectivists hold that moral judgements are descriptions of our attitudes. Expressivists hold that they are expressions of our attitudes. These views cook with the same ingredients – the natural world, and our reactions to it – and have similar attractions. This Element assesses each of them by considering whether they can accommodate three central features of moral practice: the practicality of moral judgements, the phenomenon of moral disagreement, and the mind-independence of some moral truths. In the process, several different versions of subjectivism are distinguished (simple, communal, idealising, and normative) and key expressivist notions such as 'moral attitudes' and 'expression' are examined. Different meanings of 'subjective' and 'relative' are examined and it is considered whether subjectivism and expressivism make ethics 'subjective' or 'relative' in each of these senses.

A. J. Ayer, who died in 1989, was acknowledged as one of Britain's most distinguished philosophers. In this memorial collection of essays leading Western philosophers reflect on Ayer's place in the history of philosophy and explore aspects of his thought and teaching. The volume also includes a posthumous essay by Ayer himself: "A Defence of Empiricism." These essays are undoubtedly a fitting tribute to a major figure, but the collection is not simply retrospective; rather it looks forward to present and future developments in philosophical thought that Ayer's work has stimulated.

"Ethics and Experience" presents a wide-ranging and thought-provoking introduction to the question famously posed by Socrates: How is life to be lived? 'An excellent primer for any student taking a course on moral philosophy, the book introduces ethics as a single and broadly unified field of inquiry in which we apply reason to try and solve Socrates' question. "Ethics and Experience "examines the major forms of ethical subjectivism and objectivism - including expressivism, error theory', naturalism, and intuitionism. The book lays out the detail of the most significant contemporary moral theories - including utilitarianism, virtue ethics, Kantianism, and contractarianism - and reconsiders these theories in the light of two questions that should perhaps be asked more often: Is moral theory, with its tendency to regiment ethical thought and experience, really the best way for us to apply reason to deciding how to live? And, might it not be more truly reasonable to look for less system and more insight?

This Element examines the many facets of ethical realism and the issues at stake in metaethical debates about it—both between realism and non-realist alternatives, and between different versions of realism itself. Starting with a minimal core characterization of ethical realism focused on claims about meaning and truth, we go on to develop a narrower and more theoretically useful conception by adding further claims about objectivity and ontological commitment. Yet even this common understanding of ethical realism captures a surprisingly heterogeneous range of views. In fact, a strong case can be made for adding several more conditions in order to arrive at a proper paradigm of realism about ethics when understood in a non-deflationary way. We then develop this more robust realism, bringing out its distinctive take on ethical objectivity and normative authority, its unique ontological commitments, and both the support for it and some challenges it faces.

In Taking Morality Seriously: A Defense of Robust Realism David Enoch develops, argues for, and defends a strongly realist and objectivist view of ethics and normativity more broadly. This view—according to which there are perfectly objective, universal, moral and other normative truths that are not in any way reducible to other, natural truths—is familiar, but this book is the first in-detail development of the positive motivations for the view into reasonably precise arguments. And when the book turns defensive—defending Robust Realism against traditional objections—it mobilizes the original positive arguments for the view to help with fending off the objections. The main underlying motivation for Robust Realism developed in the book is that no other metaethical view can vindicate our taking morality seriously. The positive arguments developed here—the argument from the deliberative indispensability of normative truths, and the argument from the moral implications of metaethical objectivity (or its absence)—are thus arguments for Robust Realism that are sensitive to the underlying, pre-theoretical motivations for the view.

Are there such things as moral truths? How do we know what we should do? And does it matter? Constructivism states that moral truths are neither invented nor discovered, but rather are constructed by rational agents in order to solve practical problems. While constructivism has become the focus of many philosophical debates in normative ethics, meta-ethics and action theory, its importance is still to be fully appreciated. These new essays written by leading scholars define and assess this new approach in ethics, addressing such questions as the nature of constructivism, how constructivism improves our understanding of moral obligations, how it accounts for the development of normative practices, whether moral truths change over time, and many other topics. The volume will be valuable for advanced students and scholars of ethics and all who are interested in questions about the foundation of morality.