Why modern moral philosophy failed and how we might recover a sense of purpose
In short: Alasdair MacIntyre argued that Enlightenment thinkers destroyed moral rationality by trying to detach ethics from human nature. By reviving Aristotelian virtue and Thomistic tradition, he challenged the modern illusion of the independent, self-sufficient reasoner, suggesting that our vulnerability and dependency are actually the keys to living a good life.
Alasdair MacIntyre, who passed away in 2025 at age 96, transformed 20th-century philosophy by rejecting the Enlightenment project of creating a universal, rule-based morality. In his seminal 1981 work, After Virtue, he argued that modern moral discourse is dysfunctional because it relies on fragmented concepts stripped of their original teleological context. He contended that when thinkers like Nietzsche and Sartre rejected these failed rationalist frameworks, they left behind a void where moral claims became mere expressions of personal preference, or emotivism.
To move beyond this impasse, MacIntyre proposed that moral inquiry must be understood through 'traditions'—socially embodied arguments extended through time. In works like Whose Justice? Which Rationality? (1988) and Three Rival Versions of Moral Inquiry (1990), he explored how rival traditions, such as Thomist Aristotelianism, can engage one another. While he conceded that there is no neutral, objective standard to adjudicate between these traditions, he argued that they can still be evaluated by their internal coherence and their ability to resolve epistemic crises that leave rival views paralyzed.
In his later work, Dependent Rational Animals (1999), MacIntyre bridged the gap between ethics and biology. He admitted that his earlier attempts to build an ethics independent of biology were mistaken. Instead, he argued that human vulnerability and disability are central features of our existence. By acknowledging our animal nature, he sought to replace the 'illusion of self-sufficiency' with an account of the 'virtues of dependency.' These virtues are essential for individuals to flourish as they transition from infancy to adulthood, grounding moral excellence in character rather than abstract, rule-based compliance.
MacIntyre’s philosophy remains a critique of both liberal modernity and consumerist capitalism, which he views as prioritizing external goods like power and status over the 'internal goods' of human practice. By advocating for a 'postliberal university' that fosters constrained disagreement between traditions, he envisioned a future where moral inquiry is not a search for finality, but a communal, historically-grounded pursuit of the good life.
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- Summary by Intellect · source: Alasdair MacIntyre
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