In 1942, under the pressure of war, the United States government authorized the internment of more than 120,000 people of Japanese descent. Most were American citizens. The policy was justified as a national security precaution, yet it operated without individualized determinations or meaningful due process. Decades later, the federal government formally acknowledged that the measure violated fundamental rights, issuing apologies and financial compensation.

The episode remains instructive not only for its human cost, but for what it reveals about institutional decision-making under exceptional conditions. The error ultimately recognized was not confined to the outcome; it lay in the method itself—the replacement of individualized assessment with a generalized presumption of suspicion.

In contemporary debates over immigration enforcement in the United States, particularly those involving agencies such as Immigration and Customs Enforcement (ICE), related concerns have resurfaced in a different legal and historical context. Courts, scholars, and oversight bodies have examined enforcement practices not only for their effectiveness, but for the criteria used to select targets, the degree of transparency involved, and the procedural safeguards available to those affected.

This comparison does not suggest equivalence between historical moments. The internment of Japanese Americans occurred during a declared global war; current immigration enforcement operates within a statutory framework subject to judicial oversight and constitutional constraint. Still, the parallel retains analytical relevance as an institutional caution: when broad identity markers begin to outweigh individual conduct in enforcement decisions, legal standards face sustained pressure.

The underlying concern centers on selection mechanisms. In the historical case, ancestry and national origin functioned as proxies for risk, without individualized findings of wrongdoing. Subsequent official reviews concluded that the principal failure lay in the criteria adopted, not merely in their execution.

In present-day immigration enforcement, such logic is rarely articulated explicitly. Instead, it may appear indirectly through prioritization frameworks, geographic focus areas, or the exercise of broad administrative discretion. Legal scrutiny has therefore focused on identifying the boundary between permissible discretion and impermissible generalization—an inquiry that depends on articulated justification, traceable decision-making, and the availability of review.

The question is not whether the state may enforce immigration law. It is whether enforcement decisions remain anchored to conduct rather than inferred identity. Where individualized assessment is preserved, discretion remains compatible with constitutional norms. Where it erodes, the risk is not only legal challenge but institutional drift.

Comparable dynamics can be observed in other constitutional systems, including Brazil’s.

Brazilian courts and oversight institutions have repeatedly examined enforcement practices based on broad or generalized criteria. Constitutional jurisprudence has emphasized that preventive actions may be lawful, provided they are grounded in observable conduct, supported by objective justification, and subject to subsequent review. The concern is not the existence of discretion, but the possibility that discretion becomes detached from individualized evaluation.

External oversight—by courts, public defenders, and supervisory bodies—serves to test this boundary. By requiring proportionality, justification, and traceability, such mechanisms aim to prevent exceptional measures from becoming routine or insulated from accountability.

The convergence across these contexts lies not in circumstance, but in institutional mechanics. When generalized criteria move from residual tools to guiding principles of state action, individualized judgment is displaced by categorical inference. Over time, this shift can weaken procedural safeguards, strain public trust, and normalize practices initially justified as exceptional.

Historical memory does not prevent lawful state action. It defines its boundaries. Democracies are tested not only by the threats they confront, but by the methods they choose when acting under pressure. When individualized judgment gives way to categorical inference, the erosion is rarely sudden; it is incremental, procedural, and often justified as temporary.

Respecting those boundaries does not weaken enforcement. It preserves legitimacy. And legitimacy is what allows policies to endure—across courts, administrations, and time—without requiring future apologies, reparations, or retrospective correction.

By Palmarí H. de Lucena