What happens when we apply deconstruction not only to texts but to systems of law, political institutions, and ethical decisions? The result is not a collapse into relativism or indecision, but a deeper, more rigorous account of responsibility - one that acknowledges the complexity and risk of acting in a world without stable foundations.
Justice Is Not Law
Derrida's most influential writing on law is found in his 1990 essay "Force of Law: The 'Mystical Foundation of Authority." There, he draws a critical distinction: justice is not reducible to law.
Law is a system of codes, institutions, procedures - it is calculable, formal, structured. It can be interpreted, debated, and revised. Justice, by contrast, is incalculable. It is not a set of rules, but an event - something that happens, often unexpectedly, and cannot be codified in advance.
To pursue justice is to engage with something beyond the law, even while operating within it. Derrida writes, provocatively, that “deconstruction is justice.” Not because it gives us a method for judging rightly, but because it makes us aware of the limits of any method, and calls us to responsibility in the face of that limit.
The Decision Must Be Undecidable
In politics and ethics alike, we often seek certainty: clear criteria, defined rules, guiding principles. But Derrida shows that true decisions happen precisely where certainty fails.
A “decision” that simply applies a pre-existing rule is not, in his view, a decision at all—it is a mechanical operation. A genuine decision occurs in conditions of undecidability, where no amount of reasoning will fully resolve the dilemma, where one must act without a guarantee, and where the outcome will necessarily involve risk, exposure, and the possibility of failure.
Deconstruction does not celebrate indecision - it begins with it. To decide is to take responsibility, knowing that the decision could always have been otherwise, and that no justification will ever be complete. Derrida calls this “a madness” - but one that is necessary.
Hospitality and the Other: The Ethics of Deconstruction
One of the clearest ethical threads in Derrida’s work is his concern with the Other—the one who arrives, speaks, or claims attention from outside the self, outside the system.
In works such as Adieu to Emmanuel Levinas and Of Hospitality, Derrida explores what it means to respond to the Other without assimilating them - without turning them into something familiar or controllable.
True hospitality, he argues, is impossible. To fully welcome the Other would mean suspending all conditions: no identification, no name, no expectation, no border. Yet in practice, hospitality must be conditional - governed by laws, norms, boundaries. The ethical challenge is to live within this contradiction, to host without owning, to respond without reducing the Other to sameness.
This paradox is not a failure - it is the structure of ethical experience. It means ethics is not a settled domain of rules but a constant, fragile, responsive negotiation with difference.
Autoimmunity: When Protection Becomes Danger
In later works, especially Rogues and Acts of Religion, Derrida introduces the concept of autoimmunity - a condition in which a system turns against itself in the name of protecting itself.
He uses this figure to describe modern democracies: in the effort to preserve freedom, rights, or security, they may adopt measures that undermine those very principles (e.g., surveillance, exclusion, violence). The danger does not come from outside but from the system’s self-defensive reflex, which threatens its own foundations.
Autoimmunity is not merely a pathology - it is structural. Every attempt to protect a principle also exposes it to risk. Deconstruction does not offer a cure, but a way to recognize and think through this instability, rather than conceal it under the illusion of unity or purity.
Toward a Responsible Politics
What, then, does deconstruction offer to political or ethical thought? Not certainty. Not guidelines. Not a final theory of justice. But it does offer a different attunement: to ambiguity, to responsibility, to the ways our decisions always exceed our knowledge and our control.
A deconstructive politics is not indecisive - it is more radically committed, because it acts without guarantees. A deconstructive ethics is not vague - it is more demanding, because it refuses to cover over the impossible with easy answers. It is not a refusal to act, but a call to act with full awareness of what acting costs.
We often think of law, politics, and ethics as domains where certainty is most needed. Derrida shows that these are precisely the places where certainty is most dangerous - where claims to purity and clarity often mask exclusions, violences, or blind spots.
Deconstruction does not dismantle these fields - it opens them, slows them down, forces them to speak in more than one voice. In doing so, it makes space for decisions that are more just because they are less sure.
And that, perhaps, is the deepest meaning of deconstruction in the world: not the destruction of meaning, but the deepening of responsibility