Which U.S. Supreme Court decision made it illegal to achieve diversity through the use of racial quotas?

http://www.pbs.org/wnet/supremecourt/rights/landmark_regents.html

The U.S. Supreme Court decision that made it illegal to achieve diversity through the use of racial quotas is Regents of the University of California v. Bakke (1978). To find this answer, you can follow these steps:

1. Start by searching for "U.S. Supreme Court decision on racial quotas for diversity."
2. Scan through the search results to find a reliable source, such as an official government website, law journal, or reputable news outlet.
3. Look for references to significant Supreme Court decisions related to racial quotas and diversity, particularly any mentioning the case "Regents of the University of California v. Bakke."
4. Click on the link that provides more information about this case, preferably from a trusted source.
5. Read the details and analysis provided about the Regents of the University of California v. Bakke case to confirm that it made it illegal to use racial quotas for achieving diversity.

Remember to consider multiple sources to ensure accuracy and obtain a well-rounded understanding of the topic.