Jonathan Jacobs

The main claim in this paper is that because organisms have teleological constitutions, the reduction of biology to physical science is not possible. It is argued that the teleology of organisms is intrinsic and not merely projected onto them. Many organic phenomena are end-oriented and reference to ends is necessary for explaining them. Accounts in terms of functions or goals are appropriate to organic parts and processes. siis is because ends as systemic requirements for survival and health have explanatory significance with respect to the processes that contribute to and constitute them. Reductionism cannot accommodate this sort of higher-level to lower-level explanation and so cannot account for why lower-level phenomena are as they are. Reductionism, it is claimed, is ultimately descriptive and not explanatory because it cannot regard teleological requirements as themselves basic. In seeking to explain them away it forfeits explanatory power.

Aristotle's ethical theorizing contains resources for explaining what I call ‘ethical disability’. In theories such as Kant's and Mill's it is important that criteria of right action be accessible to anyone. Aristotle's moral psychology yields a plausible account of how they are not available to everyone. Unless a correct appreciation of good is part of the agent's second nature, the agent will not recognize ethical requirements, and will not have the resources to alter his judgments. Often, bad action is not a matter of agents' flouting or violating criteria of right action that they recognize, but is a matter of agents' regarding as choiceworthy things that are in fact no good, and the agents are unable to appreciate this because of their vices. However, on the Aristotelian view, this is not a condition that diminishes responsibility, because of how voluntariness is interpreted. Some of the views of Susan Wolf and Bernard Williams are discussed in the development of this view of the moral landscape.

Maimonides uses Aristotelian philosophical idiom to articulate his moral philosophy, but there are fundamental differences between his and Aristotle’s conceptions of moral psychology and the nature of the moral agent. The Maimonidean conception of volition and its role in repentance and ethical self-correction are quite un-Aristotelian. The relation between this capacity to alter one’s character and the accessibility of ethical requirements given in the Law is explored. This relation helps explain why for Maimonides practical wisdom is not recognized as a virtue, and why ethical perfection (a requirement for human perfection) is achievable even by those long-established in ethically unsound dispositions. The power of will to “restore the soul” (by following the prescriptions of the Law) when character is disordered is a significant departure from Aristotelian philosophical anthropology.