The United States Supreme Court, in Regents of the University of California v. Bakke bars quota systems in college admissions.

Regents of the University of California v. Bakke, 438 U.S. 265 (1978), was a landmark decision by the Supreme Court of the United States. It upheld affirmative action, allowing race to be one of several factors in college admission policy. However, the court ruled that specific racial quotas, such as the 16 out of 100 seats set aside for minority students by the University of California, Davis School of Medicine, were impermissible.

Although the Supreme Court had outlawed segregation in schools, and had even ordered school districts to take steps to assure integration, the question of the legality of voluntary affirmative action programs initiated by universities remained unresolved. Proponents deemed such programs necessary to make up for past discrimination, while opponents believed they were illegal and a violation of the Equal Protection Clause of the Fourteenth Amendment to the U.S. Constitution. An earlier case that the Supreme Court had taken in an attempt to address the issue, DeFunis v. Odegaard (1974), was dismissed on procedural grounds.

Allan P. Bakke (), an engineer and former Marine officer, sought admission to medical school, but was rejected for admission due in part to his age. Bakke was in his early 30s while applying, and therefore considered too old by at least two institutions. After twice being rejected by the University of California, Davis, he brought suit in state court challenging the constitutionality of the school's affirmative action program. The California Supreme Court struck down the program as violative of the rights of white applicants and ordered Bakke admitted. The U.S. Supreme Court accepted the case amid wide public attention.

The case fractured the court; the nine justices issued a total of six opinions. The judgment of the court was written by Justice Lewis F. Powell Jr.; two different blocs of four justices joined various parts of Powell's opinion. Finding diversity in the classroom to be a compelling state interest, Powell opined that affirmative action in general was allowed under the Constitution and the Title VI of the Civil Rights Act of 1964. Nevertheless, UC Davis's program went too far for a majority of justices, and it was struck down and Bakke admitted. The practical effect of Bakke was that most affirmative action programs continued without change. Questions about whether the Bakke case was merely a plurality opinion or binding precedent were answered in 2003 when the court upheld Powell's position in a majority opinion in Grutter v. Bollinger.

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