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Human rights theory in international law begins with a puzzle: if states are sovereign, how can they be bound by rights that claim to limit their power? The Universal Declaration of Human Rights (1948) did not settle this question; it intensified it. Since 1945, a sequence of competing frameworks has offered different answers, each emerging from dissatisfaction with earlier ones. The story of human rights theory is not a steady march toward consensus but a series of debates about the source, scope, and purpose of rights.
The first generation of frameworks after World War II shared a commitment to codifying rights but disagreed sharply on why those rights should bind states.
Positive-Law Human Rights Theory argued that human rights become binding only when states consent to them through treaties or custom. On this view, the Universal Declaration is a political aspiration, not law, until states incorporate its provisions into binding instruments. This framework remains active today, especially in state practice and treaty interpretation, because it offers a clear answer to the sovereignty problem: rights bind because states have agreed to be bound.
Natural Rights Universalism directly opposed this positivist narrowing. It held that human rights derive from a moral order that exists prior to and independent of state consent. For natural rights theorists, the Universal Declaration did not create rights; it recognized rights that already belong to every person by virtue of their humanity. This framework competes with Positive-Law theory on the most basic question: whether rights are discovered or invented.
Dignitarian Human Rights Theory offered a third foundation. Rather than grounding rights in consent or natural law, it located their source in the inherent dignity of the human person. The Universal Declaration itself opens with "recognition of the inherent dignity" as the foundation of freedom, justice, and peace. Dignitarian theory has been especially influential in constitutional courts and regional human rights systems, where dignity functions as an interpretive principle that can expand or limit rights. It coexists with both positivist and natural law frameworks, sometimes bridging them by providing a shared vocabulary.
Cultural Relativism emerged almost simultaneously as a challenge to all three. If rights are universal, critics asked, whose universality are we talking about? Cultural relativists argued that moral and legal norms are products of particular cultures, and that imposing Western-derived rights on non-Western societies amounts to a new form of colonialism. The American Anthropological Association's 1947 statement on the Universal Declaration gave early voice to this position. Cultural relativism remains active today, though it has evolved into more nuanced arguments about pluralism and cross-cultural dialogue rather than a simple rejection of universality.
These four frameworks established the central fault line of the field: universalism versus particularism, moral foundation versus state consent. Later frameworks would try to escape this binary.
By the late 1970s, the foundational debate had grown stale. A new generation of theorists shifted attention from the source of rights to their function: what do human rights do for the people who claim them?
Agency-Based Human Rights Theory (1978) answered that rights protect the capacity of individuals to act as free and equal agents. Drawing on Kantian philosophy, this framework argued that the point of human rights is to secure the conditions for autonomous choice—freedom of conscience, bodily integrity, political participation. Agency theory preserved the universal ambition of natural rights but grounded it in a thinner, more widely shareable account of human personhood. It competed with both Natural Rights Universalism (by rejecting thick metaphysical commitments) and Positive-Law theory (by insisting that rights have a moral logic that consent alone cannot capture).
The Communitarian Critique of Human Rights (1980–2015) pushed back against the individualism of agency theory. Communitarians argued that human rights discourse overemphasizes the isolated individual and neglects the communities—families, religious groups, nations—that give life meaning. Rights, they warned, can dissolve social bonds and undermine collective goods. This critique was influential in the 1980s and 1990s, especially in debates about Asian values and the priority of economic development over civil liberties. By the early 2000s, however, the Communitarian Critique had largely been absorbed into other frameworks. Its concerns about cultural context and collective goods were taken up by Feminist Human Rights Theory and Third World Approaches to International Law (TWAIL), which gave them more precise political and institutional analysis.
The Capabilities Approach (1997) offered a different way to move beyond the individual-versus-community debate. Developed by Amartya Sen and Martha Nussbaum, this framework asked not what rights people have but what they are actually able to do and be. Human rights, on this view, are entitlements to a threshold level of central capabilities—life, health, bodily integrity, imagination, practical reason, affiliation. The Capabilities Approach shares with Dignitarian theory a concern for human flourishing, but it replaces the abstract language of dignity with concrete, measurable functionings. It has been especially influential in development policy and in arguments for economic and social rights.
The 1990s brought frameworks that questioned not just the foundations of human rights but the politics of the human rights project itself.
Feminist Human Rights Theory (1991) argued that mainstream human rights frameworks—both positivist and natural law—had been built on a male model of the person and had systematically excluded women's experiences. Domestic violence, reproductive control, and economic exploitation were treated as private matters beyond the reach of human rights law. Feminist theory demanded that the state be held accountable for harms that occur in the "private" sphere and that rights be reimagined to address the specific vulnerabilities of women. It reacted against Positive-Law theory's narrow focus on state consent and against Natural Rights Universalism's abstract, gender-neutral person. Feminist theory remains active and has transformed international criminal law, refugee law, and the interpretation of torture and cruel treatment.
Third World Approaches to International Law (TWAIL) (1997) emerged from a parallel critique. TWAIL scholars argued that the human rights system is not a neutral tool for protecting the vulnerable but a continuation of colonial power relations. The language of universal rights, they showed, has been used to justify military intervention, economic domination, and the suppression of alternative political models. TWAIL reacted against Natural Rights Universalism's claim to speak for all humanity and against the liberal internationalism that treats human rights as a Western gift to the rest of the world. It remains active today, pressing for a human rights practice that takes seriously the history of empire and the structural inequalities of the global economy.
Pragmatist Human Rights Theory (1998) took a different critical path. Rather than debating foundations, pragmatists asked what human rights actually accomplish in practice. Richard Rorty famously argued that we should stop trying to ground rights in reason or nature and instead focus on building sentimental attachments across difference. Human rights work, on this view, is not philosophical argument but emotional education—making people care about the suffering of strangers. Pragmatism competes with both Natural Rights Universalism (which insists on rational foundations) and the Political Conception (which insists on institutional function). It remains a minority position but has influenced human rights education and advocacy.
The Political Conception of Human Rights (1999) offered the most systematic alternative to the foundationalist tradition. Developed by John Rawls and later refined by Charles Beitz, the Political Conception argues that human rights are not pre-political moral rights but norms that serve a specific political function: they justify international concern and, in extreme cases, intervention. On this view, a right counts as a human right only if its violation is a matter of legitimate international concern. The Political Conception competes with both Positive-Law theory (by denying that state consent is the only source of obligation) and Natural Rights Universalism (by denying that rights have a moral life independent of their political role). It has become one of the most influential frameworks in contemporary scholarship, especially in debates about humanitarian intervention and the responsibility to protect.
Cosmopolitan Human Rights Theory (2002) returned to universalist ambitions but on new terms. Cosmopolitans argue that human rights are owed to every person by virtue of their membership in a global community of moral equals. Unlike Natural Rights Universalism, cosmopolitanism does not rely on a thick metaphysical account of human nature; unlike the Political Conception, it does not limit rights to what states can be expected to enforce. Cosmopolitan theory has been especially influential in debates about global justice, migration, and economic rights. It coexists with the Capabilities Approach (both share a concern for global equality) and competes with the Political Conception (over whether rights require enforcement mechanisms).
Today, no single framework dominates human rights theory. The field is genuinely pluralist, with several active traditions that divide the labor of explanation and critique.
What the leading frameworks agree on: Most contemporary theorists accept that human rights are not simply the product of state consent (a concession from Positive-Law theory) and not simply the expression of a timeless moral order (a concession from Natural Rights Universalism). There is broad agreement that human rights must be responsive to political context, attentive to power relations, and connected to the actual conditions of people's lives. The Capabilities Approach, Feminist theory, TWAIL, and the Political Conception all share this contextualist turn.
What they disagree on: The deepest disagreement today is between the Political Conception and its critics. Political Conception theorists argue that human rights are defined by their role in international practice—they are norms that justify international action. Critics—especially cosmopolitans, capabilities theorists, and natural rights universalists—argue that this reduces rights to whatever powerful states are willing to enforce. A second major fault line runs between universalist frameworks (cosmopolitanism, capabilities, natural rights) and critical frameworks (TWAIL, feminism, pragmatism) over whether the human rights system can be reformed from within or requires more fundamental transformation.
The division of labor: In practice, different frameworks dominate different domains. The Political Conception shapes debates about intervention and international institutional design. The Capabilities Approach guides development policy and economic rights advocacy. Feminist theory and TWAIL drive critical scholarship on the blind spots of human rights law. Positive-Law theory remains the default language of treaty negotiation and state practice. Dignitarian theory anchors constitutional interpretation in many jurisdictions. This pluralism is not a sign of weakness; it reflects the fact that human rights theory has become sophisticated enough to recognize that no single framework can answer every question the practice raises.