Justice Sotomayor, joined by Justice Kagan and joined by Justice Jackson as to UNC, argued that the Equal Protection Clause permits race-conscious measures aimed at achieving genuine racial equality. She traced the Reconstruction Amendments and Reconstruction-era legislation, including the Freedmen's Bureau Acts, to show that the Fourteenth Amendment was designed to protect formerly enslaved people through affirmative measures rather than to require rigid colorblindness.
She read Brown and subsequent desegregation decisions as rejecting passive race neutrality when it perpetuates existing inequality. In her view, Brown required affirmative steps to dismantle entrenched segregation and create a genuinely integrated educational system, making the majority's colorblind interpretation historically and doctrinally mistaken.
She maintained that Bakke, Grutter, and Fisher firmly established that the educational benefits of student-body diversity are compelling. Those benefits include improved learning, reduced stereotypes, cross-racial understanding, institutional legitimacy, and preparation for citizenship and leadership in a diverse democracy.
Applying that settled framework, Justice Sotomayor concluded that both programs were narrowly tailored. The trial courts found that SFFA's proposed race-neutral alternatives were unrealistic, ineffective, or required unacceptable sacrifices to the schools' broader educational objectives. Harvard and UNC used race as one flexible factor in individualized, holistic review rather than a quota or mechanical preference.
She rejected the majority's claims that the universities engaged in racial balancing, used race as an impermissible negative, or lacked a valid endpoint. In her view, Grutter required ongoing review of whether race-conscious measures remained necessary, not a fixed expiration date based on an arbitrary prediction that racial inequality would disappear by a certain year.
Justice Sotomayor stressed that persistent racial disparities in K–12 education, wealth, health, employment, and access to opportunity make formal colorblindness inadequate. She predicted that the decision would substantially reduce enrollment of underrepresented minorities at selective institutions, diminish diverse professional pipelines, and entrench rather than remedy segregation and inequality.