Unifying Moral Philosophy

 

If you're new to philosophy, you'll get told that there are loads of moral theories to consider, and you'll end up entangled in a complex web of interrelated and competing propositions that take you far off course from fundamental principles. Here I’m going to show that you only really need the big four, and I'm going to radically simplify things by showing that the big four moral theories in philosophy are really just partial rational reconstructions of a unified moral reality whose fullness is revealed in Christ. In other words, the fundamental moral theories we engage with in moral philosophy are partial, distorted, or truncated apprehensions of a deeper moral reality that finds its unity in Christ.

First, I’ll briefly summarise the big four moral theories. Consequentialism judges actions by their outcomes: the right act is the one that produces the best overall result. Deontology is underwhelmed by outcome-based morality, insisting that some actions are inherently right or wrong because of moral duties and principles that must be followed regardless of consequences. Virtue ethics shifts the focus from isolated acts to the formation of character, arguing that morality is about becoming a good person whose habits naturally produce right action. Natural law provides the deeper foundation for all of this by asserting that morality is grounded in the purpose and structure of human nature, so the good is what fulfils the kind of creature we were created to be, and moral rules are practical guides to flourishing.

To see how the fundamental moral theories are embedded in a deeper Christ-centred reality, we must first recognise that Christ is the moral telos: the final purpose toward which all moral action is directed. Creation has a purpose - relationship with God - and moral norms are ordered toward that end. Outcomes matter in worldly terms, but they matter primarily because they shape us toward or away from that end. Likewise, God’s commandments are truthful expressions of the good life for creatures made in God’s image.

From this perspective, each of the four moral theories presents a genuine aspect of moral reality, but each is but a subset of the full picture - the moral perfection of God. Let me try to lay it out. Consequentialism correctly insists that the consequences of our actions matter; God cares about results, because results shape the moral formation of the world and the flourishing of individuals. But consequentialism becomes incomplete when it treats outcomes as the sole criterion of rightness, inadequately capturing the wrongness of actions even if they produce good effects.

Deontology corrects this by insisting that moral duties are binding, but it can become rigid when it divorces duties from the moral telos and the real effects of action, treating rules as if they are extricable from human flourishing, which scripture confirms is untrue. Virtue ethics rightly returns us to character, arguing that morality is about becoming a person who naturally loves well; but it can become incomplete if it fails to specify the objective good toward which virtue aims, or if it ignores the need for moral rules in a fallen world.

So, here we could say that natural law provides the missing foundation, in that it explains why moral norms bind, why virtues are ordered toward human flourishing, and why outcomes and duties are not ultimately mere human construct, but in fact rooted in the purpose God built into human nature.

Thus, when seen most truthfully, the “big four” are not competing systems, as many philosophers think - they are more like four lenses we use to view the same horizon. Consequentialism highlights the moral importance of results, deontology highlights the binding authority of duty, virtue ethics highlights the formation of character, and natural law supplies the metaphysical and theological grounding that makes all three intelligible. When they are properly understood, they complement each other, and they all point toward the same moral reality revealed in Christ.

We are nearly there, but while I think everything above is correct - it won’t quite do by itself, because we now have to frame this though God’s love (agape) as the inner power that explains why telos, duty, consequence, and virtue all cohere. Because at the very deepest level, the unity of these moral perspectives cannot be explained by abstract teleology alone, only by Divine love. To offer a musical analogy, the telos explains the intended harmony of the piece, but only love explains the Divine unity and expressiveness of the performance. In other words, one can play some of the correct notes and still miss the music; love is what binds the timing, tone, cohesion and emphasis into something intelligible as music rather than mere notes and chords.

Or to put it another way, the telos explains where the journey is going, but love explains the call to undertake it, persevere through it, and be united with fellow travellers along the way - because the whole journey and the final destination is all about love really. If we could peep behind the stage door and see the full production scenes for the grand cosmic narrative, we’d see that every human motive, aspiration, connection, desire and decision - from the clothes we wear, the career we pursue, the friendships we cultivate, the families we form, the sacrifices we make, the approval we seek, the meaning we chase - was really a reaching out for love rightly ordered and finally fulfilled in God.

That is why I think Christ names love of God and love of neighbour as the two great commandments, because in doing so He reveals love not merely as one moral value among others, but as the true form of all moral goodness. Love explains why consequences matter, because to love another is to seek their true good; it explains why duties bind, because love respects the dignity and inviolability of persons; it explains why virtue is central, because love must be learned, habituated, and embodied in character; and it explains why natural law has authority, because love is ordered toward the flourishing of the kinds of creatures God created us to be. Detached from love, consequentialism becomes a mere calculus of instrumental optimisation, deontology becomes mere legalism, virtue ethics becomes mere self-cultivation, and natural law becomes mere biology. Rooted in love, however, these are revealed as distinct but harmonious ways of articulating what it means to live rightly before God and with one another.