Research

Nathan’s research spans epistemology and philosophy of science, the study of Plato, and political theory and political economy. These inquiries connect through questions about warranted belief, practical judgment, and authority: how claims are assessed, what follows from accepting them, and whose judgment counts. A developing inquiry into music examines the relations among listening, performance, and understanding.

Epistemology and philosophy of science

Scientific inquiry depends on methods that can fail. Repeating a result or reaching agreement may leave a shared source of error untouched. Nathan's work asks how criticism, correction, and checks with different possible errors contribute to scientific objectivity, and what further reasoning supports warranted belief.

In Objectivity in Science, he develops an account of objectivity through public, revisable testing across methods with meaningfully different ways of failing. The account emphasizes the conditions under which a check can expose an error that another method misses. The relation between surviving such checks and having good grounds for belief remains a further question in his current research.

A connected problem concerns target continuity: what justifies treating different methods, or descriptions that change over time, as inquiries into the same thing? Comparison requires some account of what stays the same, what changes, and which differences matter. Nathan is examining how those judgments can themselves be tested without assuming the continuity they are meant to establish.

The Structure-Dependence Problem addresses the limits of inference from robust agreement. Robustness does not by itself deductively establish correspondence with mind-independent reality; a realist interpretation requires a further argument. The Axiom of Hope develops this problem and proposes methods for making the conditions of claims and comparisons explicit. Current research also examines representation, aboutness, and error, keeping the success of a representation distinct from the grounds for claims about reality.

Plato

Nathan’s research on Plato is organized around a set of long-term problems developed through close reading and comparison across dialogues. His primary current project concerns expertise and authority: when knowledge or competence concerning a good can justify directing others, how genuine expertise can be distinguished from its imitations, and what role law and institutions should play when that distinction remains uncertain.

Related research examines several connected but independent problems across the Platonic corpus. These include what makes a division or classification reveal the structure of its subject; how acquiring, possessing, exercising, and explaining knowledge differ; when representations can guide understanding and when their form becomes an obstacle; how different kinds of cause contribute to explaining order and goodness; how inherited standards can be preserved while still permitting justified correction or revision; and how attachment, desire, and education reshape what a person recognizes and acts on as good.

This work treats the dialogues as philosophically demanding arguments rather than as components of a single predetermined Platonic system. Cross-dialogue comparison is used to identify distinctions, tensions, and cumulative questions while preserving differences in argumentative purpose and dramatic setting. Individual projects include work on expertise and statesmanship, dialectical division, knowledge and explanation, representation, moral formation, and the Protagoras. A continuing Protagoras project examines the philosophical significance of interpreting an absent poet within a dialogue otherwise structured by questioning, answerability, and direct examination of living speakers.

Political theory and political economy

Nathan’s political research examines how political and economic institutions organize work, distribute resources, and structure collective decision-making. It asks how authority is justified, whose knowledge and interests count, and how people can contest decisions made on their behalf. Ownership, administrative responsibility, access to information, and material resources shape what participation makes possible. The research compares formal powers and stated purposes with how institutions actually operate, including how efforts to change them can redistribute or reproduce power.

Historical inquiries into Yugoslav self-management and Allende’s Chile give these questions concrete settings. His current work on Chile examines relations among workers, managers, state institutions, and political organizations, distinguishing responsibility for implementing decisions from authority to determine them. Project Cybersyn is one case within this broader inquiry into economic coordination and political authority. The work traces how decisions were made and what enabled people to act, before drawing conclusions about whether and how Cybersyn affected workers’ political authority.

Music and understanding

This developing inquiry asks what listening and performance can make intelligible when descriptive propositions do not exhaust the understanding involved. Music provides a concrete setting for examining the relations among affect, experience, practical skill, and understanding.

Nathan is interested in how a listener or performer grasps musical structure, recognizes expressive possibilities, and responds within improvisation. The questions include what can be identified, corrected, or carried from one musical setting to another. Feeling something, performing skillfully, and knowing something make different demands. The research explores these distinctions without treating the force of a musical experience as sufficient evidence of knowledge or metaphysical disclosure.