Answer:
Craig v. Boren was a landmark case in the United States in 1976 in which the Supreme Court of the United States struck down an Oklahoma statute that allowed women to purchase beer at age 18 but required men to be 21 years old. The statute was challenged by Curtis Craig, a male who was 19 years old at the time and who argued that the statute was discriminatory and violated the Equal Protection Clause of the Fourteenth Amendment of the U.S. Constitution. The Supreme Court held that the statute was unconstitutional because it did not further an "exceedingly persuasive" governmental interest, which was required for the law to pass scrutiny under the Equal Protection Clause. The Court's ruling in Craig v. Boren established the "intermediate scrutiny" standard for sex discrimination cases, which required a "substantially related" government interest to justify a sex-based classification.