Brian Leiter

The seven original essays included in this volume from 2000, written by some of the world's most distinguished moral and legal philosophers, offer a sophisticated perspective on issues about the objectivity of legal interpretation and judicial decision-making. They examine objectivity from both metaphysical and epistemological perspectives and develop a variety of approaches, constructive and critical, to the fundamental problems of objectivity in morality. One of the key issues explored is that of the alleged 'domain-specificity' of conceptions of objectivity, i.e. whether there is a conception of objectivity appropriate for ethics that is different in kind from the conception of objectivity appropriate for other areas of study. This volume considers the intersection between objectivity in ethics and objectivity in law. It presents a survey of live issues in metaethics, and examines their relevance to theorizing about law and adjudication.

In teaching jurisprudence, I typically distinguish between two different families of theories of adjudication—theories of how judges do or should decide cases. “Formalist” theories claim that the law is “rationally” determinate, that is, the class of legitimate legal reasons available for a judge to offer in support of his or her decision justifies one and only one outcome either in all cases or in some significant and contested range of cases ; and adjudication is thus “autonomous” from other kinds of reasoning, that is, the judge can reach the required decision without recourse to nonlegal normative considerations of morality or political philosophy. I also note that “formalism” is sometimes associated with the idea that judicial decision-making involves nothing more than mechanical deduction on the model of the syllogism—Beccaria, for example, expresses such a view. I call the latter “Vulgar Formalism” to emphasize that it is not a view to which anyone today cares to subscribe.

Nietzsche holds that people lack freedom of the will in any sense that would be sufficient for ascriptions of moral responsibility; that the conscious experience we have of willing is actually epiphenomenal with respect to the actions that follow that experience; and that our actions largely arise through non-conscious processes (psychological and physiological) of which we are only dimly aware, and over which we exercise little or no conscious control. At the same time, Nietzsche, always a master of rhetoric, engages in a “persuasive definition” (Stevenson 1938) of the language of “freedom” and “free will,” to associate the positive valence of these terms with a certain Nietzschean ideal of the person unrelated to traditional notions of free will.

Evolutionary biology – or, more precisely, two (purported) applications of Darwin's theory of evolution by natural selection, namely, evolutionary psychology and what has been called human behavioral biology – is on the cusp of becoming the new rage among legal scholars looking for interdisciplinary insights into the law. We argue that as the actual science stands today, evolutionary biology offers nothing to help with questions about legal regulation of behavior. Only systematic misrepresentations or lack of understanding of the relevant biology, together with far-reaching analytical and philosophical confusions, have led anyone to think otherwise. Evolutionary accounts are etiological accounts of how a trait evolved. We argue that an account of causal etiology could be relevant to law if (1) the account of causal etiology is scientifically well-confirmed, and (2) there is an explanation of how the well-confirmed etiology bears on questions of development (what we call the Environmental Gap Objection). We then show that the accounts of causal etiology that might be relevant are not remotely well-confirmed by scientific standards. We argue, in particular, that (a) evolutionary psychology is not entitled to assume selectionist accounts of human behaviors, (b) the assumptions necessary for the selectionist accounts to be true are not warranted by standard criteria for theory choice, and (c) only confusions about levels of explanation of human behavior create the appearance that understanding the biology of behavior is important. We also note that no response to the Environmental Gap Objection has been proffered. In the concluding section of the article, we turn directly to the work of Owen Jones, a leading proponent of the relevance of evolutionary biology to law, and show that he does not come to terms with any of the fundamental problems identified in this article

General jurisprudence-that branch of legal philosophy concerned with the nature of law and adjudication-has been relatively unaffected by the "naturalistic" strains so evident, for example, in the epistemology, philosophy of mind and moral philosophy of the past forty years. This paper sketches three ways in which naturalism might affect jurisprudential inquiry. The paper serves as a kind of precis of the main themes in my book NATURALIZING JURISPRUDENCE: ESSAYS ON AMERICAN LEGAL REALISM AND NATURALISM IN LEGAL PHILOSOPHY (Oxford University Press, 2007).