
Philosopher's Zone Can atheists be virtuous? The moral philosophy of Catharine Trotter Cockburn
Dec 4, 2025
Jackie Broad, a Professor of Philosophy at Monash University, deep dives into the intriguing moral philosophy of Catharine Trotter Cockburn. They explore how Cockburn, a defender of John Locke, navigated the moral landscape of her time, asserting that virtue is attainable through reason—even for atheists. Broad reveals Cockburn’s unique blend of Christian faith and Stoic principles, as well as her firm belief in the internal motivations that guide morality. Their discussion highlights why Cockburn's ideas are essential for modern debates on ethics and virtue.
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Locke-Inspired Moral Naturalism
- Catherine Trotter Cockburn adopted John Locke's epistemology and used it to found a moral theory.
- She argued humans can know moral truths by reflecting on ideas from sensation and reflection.
Fitness-Based Moral Order
- Cockburn defended a fitness theory: actions are right when they fit our rational, sociable, sensible nature.
- She located an eternal moral order discoverable by reflection, independent of God's will.
Virtue As Internal Right Motive
- Cockburn defined virtue stoically as correct internal motives and practical reasoning in line with our nature.
- She emphasized intentions over outcomes as the mark of a truly virtuous person.




