Summary of Philosophy for the Use of Schools - Moral Philosophy, or Ethics, and Natural Law, Volume III - Tommaso Maria Zigliara

This third volume completes Zigliara’s philosophical manual for schools by turning to moral philosophy, presenting a systematic account of human action, ethical life, and natural law within the Thomistic tradition of Thomas Aquinas.

The work begins with general ethics, analyzing human acts in relation to reason, will, and moral responsibility. Zigliara explains the structure of voluntary action, the role of conscience, and the conditions for moral judgment. He then treats the passions and virtues, showing how rational order governs the appetitive life and how stable habits orient the person toward moral good.

A central portion is devoted to natural law, understood as the participation of rational creatures in the eternal law of God. Zigliara explains how moral principles are grounded in human nature and accessible to reason, forming the basis of objective ethical obligation and social order.

The volume also addresses justice, rights, duties, and the moral foundations of society, including the principles that govern family and civil life. Throughout, Zigliara maintains a clear pedagogical structure, presenting ethics as a rational science rooted in human nature and ordered toward the ultimate end of human flourishing and moral perfection.