Equal Protection: Intermediate Scrutiny

Intermediate scrutiny is the legal standard that governs one of the most significant and evolving areas of constitutional law: the fight against gender discrimination. It represents a crucial middle ground in judicial review, requiring more justification from the government than a rational basis but less than the compelling interest needed for strict scrutiny. Understanding this test is essential for analyzing how courts evaluate laws that classify people by sex or legitimacy, forcing a direct confrontation with deeply ingrained societal stereotypes.

The Emergence of a Middle-Tier Standard

The Equal Protection Clause of the Fourteenth Amendment mandates that no state shall "deny to any person within its jurisdiction the equal protection of the laws." For most of American history, courts reviewed laws challenged under this clause using the highly deferential rational basis test. Under this standard, a classification need only be rationally related to a legitimate governmental interest, a hurdle so low that most laws survived. At the other extreme, strict scrutiny applies to classifications based on race or national origin, requiring the law to be narrowly tailored to achieve a compelling governmental interest, a test that is almost always fatal to the law.

By the 1970s, it became clear that gender discrimination did not fit neatly into either category. It was not as historically invidious as racial classification, but it was also not a benign distinction warranting minimal review. The Supreme Court forged a new path in Reed v. Reed (1971), where it struck down an Idaho law giving men automatic preference over women as estate administrators. While the Court formally applied rational basis, its actual scrutiny was more searching, questioning whether the administrative convenience offered by the gender-based rule was a sufficient justification. This case signaled the Court’s willingness to look beyond mere rationality for sex-based classifications.

The Formalization of Intermediate Scrutiny

The test crystallized in the 1970s through a series of landmark cases. In Craig v. Boren (1976), the Court explicitly announced the modern standard: "classifications by gender must serve important governmental objectives and must be substantially related to achievement of those objectives." The case involved an Oklahoma law that allowed women to buy 3.2% beer at age 18 but required men to be 21. The state argued the law promoted traffic safety, citing statistics showing young men were arrested for drunk driving more often. The Court found the objective important but held the statistical correlation was too tenuous; the classification was not substantially related to the goal. This established that intermediate scrutiny demands a very close fit between means and ends, rejecting loose generalizations.

This period also saw the Court grapple with laws that were ostensibly designed to "protect" women. In United States v. Virginia (1996), the Court applied intermediate scrutiny to strike down the Virginia Military Institute’s (VMI) male-only admissions policy. The state’s proffered important objective was providing a distinctive "adversative" military-style education. The Court, however, found the classification based on impermissible stereotypes—specifically, "generalizations about ‘the way women are’"—and not a substantial relation to the objective. Justice Ginsburg’s majority opinion emphasized that the government must show an "exceedingly persuasive justification" for gender-based classifications, a phrasing that arguably tightens the standard. The state could not exclude qualified women simply because most women might not choose VMI’s method; the remedy was to admit women who could meet the physical and mental standards.

Analyzing the Test's Two Prongs in Practice

Applying intermediate scrutiny is a two-step analytical process that requires careful, case-specific evaluation.

First, identifying an "Important Governmental Objective." This prong excludes trivial or invented goals. Objectives like "administrative convenience" (from Reed) are insufficient. However, goals such as compensating women for past economic discrimination (Califano v. Webster, 1977), promoting fetal health, or maintaining the effectiveness of a combat military unit have been accepted as important. The key is that the objective must be genuine and significant, not based on archaic assumptions about gender roles.

Second, assessing the "Substantially Related" fit. This is the heart of the analysis. The government cannot rely on overbroad generalizations. The means (the gender-based classification) must have a very close and direct relationship to the end (the important objective). For example:

• In Mississippi University for Women v. Hogan (1982), the state’s objective of compensating women for discrimination in nursing education was deemed important. However, excluding men from the nursing school was not substantially related to that goal; instead, it perpetuated the stereotype that nursing is "women’s work."
• Conversely, in Rostker v. Goldberg (1981), the Court upheld Congress’s decision to register only men for the draft. The important objective was raising a combat-ready army. At the time, laws and policies barred women from combat roles. Given that context, the Court found the male-only registration was substantially related to the goal of efficient mobilization for combat. This controversial decision highlights how the test is context-dependent and not automatically fatal.

Common Pitfalls

When analyzing intermediate scrutiny, several common errors can undermine your legal reasoning.

1. Conflating it with Strict or Rational Basis Scrutiny. A major mistake is applying the wrong standard. Remember, intermediate scrutiny is its own distinct test. Do not demand a "compelling" interest (strict scrutiny), and do not accept a merely "rational" relationship (rational basis). The precise language—"important" objective and "substantially related"—is non-negotiable and defines the analytical framework.

1. Accepting Stereotypes as a Sufficient Justification. The central thrust of modern intermediate scrutiny is to root out gender stereotypes. A common pitfall is failing to recognize a stereotype masquerading as a government objective or as the means to achieve it. If the state’s argument rests on generalizations about how men or women "typically" behave, think, or are physically constituted (like in VMI), you have likely identified an impermissible justification that fails the "substantially related" prong.

1. Overlooking the "Exceedingly Persuasive Justification" Language. While not an official fourth prong, the Court in United States v. Virginia stated that the burden of justification is "exceedingly persuasive" and remains on the government. Treating intermediate scrutiny as a purely mechanical, two-step test is an error. You must evaluate whether the government has met this heightened burden of proof, which requires an analysis of actual evidence, not hypotheticals or archaic reasoning.

1. Assuming All Gender Classifications Are Invalid. Intermediate scrutiny is not a automatic death sentence. The government can and does prevail when it provides genuine, non-stereotypical reasons supported by a tight fit between the classification and the objective. The outcome in Rostker demonstrates this. The analysis is always nuanced, requiring you to dissect the specific government interest and the actual relationship of the law to it.

Summary

• Intermediate scrutiny is the heightened standard of judicial review applied to classifications based on gender and legitimacy, requiring the government to prove the law is substantially related to an important governmental objective.
• The standard evolved from Reed v. Reed and was formally articulated in Craig v. Boren, moving beyond mere rationality to require a close fit between the discriminatory means and the government’s ends.
• Its core mission, cemented in cases like United States v. Virginia (VMI), is to eliminate laws based on impermissible stereotypes about the roles and capacities of men and women, demanding an "exceedingly persuasive justification" for any sex-based classification.
• The test is context-dependent and not automatically fatal; the government can succeed if it demonstrates a genuine, non-stereotypical objective and a classification directly and closely tailored to achieve it.
• Accurate application requires careful separation from other standards of review and a vigilant focus on whether the government’s reasoning relies on overbroad generalizations about gender.