Adam Smith’s "Essays on Philosophical Subjects" presents a thesis that the principles of natural philosophy, particularly those concerning the universe's orderly and harmonious workings, can and should be applied to the understanding of human society and morality. Smith argues that the regularity and uniformity observed in physical phenomena are mirrored in the moral world, suggesting that moral sentiments and social institutions arise from discoverable, natural causes rather than divine revelation or arbitrary decree. The essays explore the historical development of philosophical inquiry, tracing the evolution of thought from ancient Greek philosophers to contemporary figures, and examine the nature of scientific discovery itself, emphasizing the role of imagination and the human desire for system-building.

The book’s key ideas include the distinction between "philosophy of nature" and "philosophy of human nature," the notion of "invisible chains" that hold together complex phenomena, and the role of "sympathy" as a foundation for moral judgment. Readers gain insight into the intellectual context from which Smith’s more famous economic works emerged, understanding his broader project of applying rational, empirical methods to understand the fundamental principles governing both the natural and social worlds. The essays reveal a consistent commitment to unveiling the hidden…

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Key concepts

Invisible Chains — Metaphor for the underlying, unseen principles that connect and explain diverse phenomena, making them appear orderly and regular.
Sympathy — The human capacity to imagine experiencing the feelings of others, which Smith identifies as a primary mechanism for moral judgment and social cohesion.
Philosophy of Nature — The study of the principles governing the physical universe, characterized by regularity and predictability.
Philosophy of Human Nature — The study of the principles governing human thought, sentiment, and action, including moral and social behavior.
System-building — The inherent human tendency to construct comprehensive explanations and theoretical frameworks for observed phenomena, even when evidence is incomplete.