The harmful dysfunction (HD) analysis of "disorder" holds that disorders are harmful failures of "designed" (that is, naturally selected) functions. Murphy and Woolfolk (2000) present a series of proposed counterexamples to the HD analysis to support their claim that it fails to provide a necessary condition for disorder. They argue that disorder can exist where there is no failed function, as in failed spandrels and inflamed vestigial organs, and that there can be disorders when everything is working as designed, as (...) in environment--design mismatches and disorders acquired through normal learning processes. They also argue that the HD analysis suffers from methodological problems, including value-ladenness of dysfunction judgments and unwarranted assumptions about the nature of internal mechanisms and their functions. -/- In this paper, each of these objections is critically evaluated. Reanalysis of the proposed counterexamples is argued to reveal strong support for the HD analysis. For example, failed spandrels are considered disorders when and only when they imply failures of designed functions; dysfunctions of vestigial organs involve failures of function at the tissue level, not the organ level; mechanism-environment mismatches are not considered disorders; and conditions acquired through normal learning processes can involve dysfunctions and are considered disordered only when they do. Murphy and Woolfolk's methodological objections are found to be based on a misinterpretation of the HD analysis. It is concluded that Murphy and Woolfolk fail to offer a cogent objection to the HD analysis. (shrink)

"Grapples with the legacy of Jerome Wakefield, one of the most influential critics of modern psychiatry and the use of the DSM for psychiatric diagnosis"--.

This article reviews scientific advances in the prevention and treatment of substance-use disorder and related developments in public policy. In the past two decades, research has increasingly supported the view that addiction is a disease of the brain. Although the brain disease model of addiction has yielded effective preventive measures, treatment interventions, and public health policies to address substance-use disorders, the underlying concept of substance abuse as a brain disease continues to be questioned, perhaps because the aberrant, impulsive, and compulsive (...) behaviors that are characteristic of addiction have not been clearly tied to neurobiology. Here we review recent advances in the neurobiology of addiction to clarify the link between addiction and brain function and to broaden the understanding of addiction as a brain disease. (shrink)

Christopher Boorse’s biostatistical theory of medical disorder claims that biological part-dysfunction (i.e., failure of an internal mechanism to perform its biological function), a factual criterion, is both necessary and sufficient for disorder. Jerome Wakefield’s harmful dysfunction analysis of medical disorder agrees that part-dysfunction is necessary but rejects the sufficiency claim, maintaining that disorder also requires that the part-dysfunction causes harm to the individual, a value criterion. In this paper, I present two considerations against the sufficiency claim. First, I analyze Boorse’s (...) central argument for the sufficiency claim, the “pathologist argument,” which takes pathologists’ intuitions about pathology as determinative of medical disorder and conclude that it begs the question and fails to support the sufficiency claim. Second, I present four counterexamples from the medical literature in which salient part-dysfunctions are considered nondisorders, including healthy disease carriers, HIV-positive status, benign mutations, and situs inversus totalis, thus falsifying the sufficiency claim and supporting the harm criterion. (shrink)

In this two-part analysis, I analyze Marc Lewis’s arguments against the brain-disease view of substance addiction and for a developmental-learning approach that demedicalizes addiction. I focus especially on the question of whether addiction is a medical disorder. Addiction is currently classified as a medical disorder in DSM-5 and ICD-10. It is further labeled a brain disease by NIDA, based on observed brain changes in addicts that are interpreted as brain damage. Lewis argues that the changes result instead from normal neuroplasticity (...) and learning in response to the intense rewards provided by addictive substances, thus that addiction is not a brain disease and by implication not a medical disorder at all. I argue that even if one accepts Lewis’s reinterpretation of the brain evidence, his conclusions do not follow. Relying on my harmful-dysfunction analysis of medical disorder, I defend the view that substance addiction is in fact a medical disorder and a brain disorder. In Part 1, I identify five arguments Lewis puts forward against the brain-disease view and evaluate them as arguments that addiction is not a disorder: Addiction is not a chronic, relapsing condition; There is no clear boundary between addiction and other strong desires; Negative consequences are not unique to disorders; The brain disease model does not account for behavioral addictions; and, Addiction is like love. I argue that Lewis’s arguments are invalid because they fail to take account of the context of addiction and its relation to biological design. (shrink)

In the first part of this article, I argue that Christopher Megone's natural-kind interpretation of Aristotle's argument that "the function of a human being is reason" does not resolve major puzzles about the argument, specifically the puzzles of why a human being has a function and why reason is that function. I attempt to resolve these puzzles by supplementing the natural-kind account with the doctrine that reason is the master regulatory natural function by which individuals enter into social life. In (...) the second half, I critique Megone's value account of function and argue for a nonevaluative, causal-explanatory account of function and teleological explanation. (shrink)