[kelukelugames]

It's literally in the link.

"Opponents of affirmative action argue that aiming for diversity in areas other than race, such as socioeconomic class, can ensure sufficiently diverse student bodies. The most common race-neutral policy used as an alternative to affirmative action is a plan that the University of Texas already uses, in which a percentage of graduates from every high school get automatic admission. These policies have been shown to increase racial and ethnic diversity on campus, but research on whether they’re as effective as more explicit race-based affirmative action policies has been mixed, and critics say that it doesn’t make sense to use a proxy when so many colleges continue to struggle with racial diversity."