Do we desire things because they are good, or are they good because we desire them? Objectivists answer that we desire things because they are good; subjectivists answer that things are good because we desire them. Further, does it make sense to account for moral disagreement by claiming, as the moral relativist does, that something might be good for one person but not for another? Some essays in this book consider whether objective moral truths can be grounded in an understanding of the nature of human beings as rational and social animals. Some discuss the ethical theories of historical figures-Aristotle, Aquinas, or Kant-or offer critical assessments of the work of recent and contemporary theorists-such as Moore, Putnam, Ayn Rand, Philippa Foot, and Rosalind Hursthouse. Other essays ask whether moral principles and values can be constructed through a process of practical reasoning or deliberation. Still others consider what the phenomenology of our moral experiences can reveal about moral objectivity.

What is the nature of law? Does our obligation to obey the law extend to unjust laws? From what source do lawmakers derive legitimate authority? What principles should guide us in the design of political institutions? The essays in this collection, written by prominent contemporary philosophers, explore how these questions were addressed by ancient political thinkers, including the Pre-Socratics, Plato, Aristotle, and the Stoics and Epicureans. Classical theories of human nature and their implications for political theory are examined, as is the meaning of freedom and coercion in Plato's thought. Plato's idea that philosophers should be political rulers receives scrutiny, too. Other essays ask what we can learn from ancient thinkers like Aristotle about the principles of constitutional design or the limits of political obligation.